191 + Mcqs in Problems in Vlsi Page 3 McqOptions

101.	In what ratio salt costing Rs. 13/kg mixed with another salt costing Rs. 7/ kg to get a mixture costing Rs 9/kg?
A.	4 : 7
B.	3 : 5
C.	2 : 3
D.	1 : 2
Answer» E.

Discussion

102.	A 20% ethanol solution is mixed with another ethanol solution, say, S of unknown concentration in the proportion 1 : 3 by volume. This mixture is then mixed with an equal volume of 20% ethanol solution. If the resultant mixture is a 31.25% ethanol solution, then the unknown concentration of S is
A.	48%
B.	55%
C.	52%
D.	50%
Answer» E.

Discussion

103.	How much of pure alcohol has to be added to 500 ml of a solution that contains 10% alcohol in order to change the concentration of alcohol in the mixture of 20%?
A.	60 ml
B.	62.5 ml
C.	45.5 ml
D.	50 ml
Answer» C. 45.5 ml

Discussion

104.	A jar contains a mixture of 175 ml water and 700 ml alcohol. Gopal takes out 10% of the mixture and substitutes it by water of the same amount. The process is repeated once again. The percentage of water in the mixture is now
A.	30.3
B.	20.2
C.	25.4
D.	35.2
Answer» E.

Discussion

105.	How many litres of water should be added to a 7.5 litre mixture of acid and water containing acid and water in the ratio of 1 : 2 such that the resultant mixture has 20% acid in it?
A.	10
B.	2.5
C.	7.5
D.	5
Answer» E.

Discussion

106.	In what ratio must Rs. 50 per kg salt be mixed with Rs. 80 per kg salt to obtain a mixture worth of Rs. 60 per kg.
A.	1 : 2
B.	2 : 1
C.	1 : 1
D.	3 : 2
Answer» C. 1 : 1

Discussion

107.	A shopkeeper mixes two varieties of rice purchased at the rate of Rs. 35 per kg and at the rate of Rs. 28 per kg respectively. If he sells the mixture at the rate of Rs. 36 per kg and gains 20%, then the ratio in which the two varieties are mixed is:
A.	5 ∶ 3
B.	4 ∶ 7
C.	2 ∶ 5
D.	7 ∶ 4
Answer» D. 7 ∶ 4

Discussion

108.	In what ratio should Assam Tea costing Rs. 300 per kg be mixed with Darjeeling Tea costing Rs. 400 per kg, so that by selling the mixture at Rs. 408 per kg there is gain of 20%.
A.	1 : 2
B.	3 : 2
C.	2 : 5
D.	1 : 6
Answer» C. 2 : 5

Discussion

109.	An alloy contains lead and aluminium in the ratio 3 ∶ 5. If lead has 15% impurity and aluminum 55%, what is the average impurity percentage of the alloy?
A.	30%
B.	40%
C.	22%
D.	35%
Answer» C. 22%

Discussion

110.	In what ratio should cement costing Rs. 250 per bag be mixed with cement costing Rs. 325 per bag so that the cost of the mixture is Rs. 300 per bag. (A bag of cement is 50 kg).
A.	1 : 2
B.	2 : 1
C.	3 : 2
D.	2 : 3
Answer» B. 2 : 1

Discussion

111.	In a mixture, ink and water are in the ratio of 8 : 5. If 24 litres of water is added to the mixture, then the new ratio becomes 8 : 11. What is the total quantity (in litres) of water in the new mixture?
A.	40
B.	42
C.	44
D.	48
Answer» D. 48

Discussion

112.	In 24 kg of rice, costing Rs. 46 per kg. how much rice costing Rs. 74 per kg should be mixed so that the cost of the mixture is worth Rs. 62 per kg?
A.	32 kg
B.	36 kg
C.	35 kg
D.	34 kg
Answer» B. 36 kg

Discussion

113.	In what ratio should water be mixed with wine, that costs Rs. 60 per litre, so that the price of the resultant mixture is Rs.40 per litre?
A.	2 ∶ 3
B.	3 ∶ 4
C.	1 ∶ 2
D.	4 ∶ 5
Answer» D. 4 ∶ 5

Discussion

114.	4 litre of a solution having 10% acid was mixed with 5 litre of a solution having 16% acid. Six litre of pure acid was then added to the resulting solution. The concentration of acid in the final solution is:
A.	48%
B.	50%
C.	54%
D.	60%
Answer» B. 50%

Discussion

115.	In what ratio tea at Rs 240 per kg be mixed with tea at Rs 300 per kg so that on selling the mixture at Rs 336 per kg there is a profit of 20%?
A.	1 : 2
B.	2 : 3
C.	3 : 4
D.	1 : 1
Answer» B. 2 : 3

Discussion

116.	A mixture of 80 liters of wine and water contains 60 percent wine. How much water must be added to make it 50 percent wine in the new mixture?
A.	18 liters
B.	12 liters
C.	20 liters
D.	16 liters
Answer» E.

Discussion

117.	If 2 litres of water are evaporated on boiling 8 litres of sugar solution containing 6% of sugar, then the percentage of sugar in the remaining solution is :
A.	0.6%
B.	0.8%
C.	6%
D.	8%
Answer» E.

Discussion

118.	In what ratio wheat costing Rs. 17/ kg should be mixed with another wheat costing Rs. 12/kg to get a mixture costing Rs. 13.5/ kg?
A.	1 : 2
B.	2 : 5
C.	3 : 7
D.	4 : 9
Answer» D. 4 : 9

Discussion

119.	An alloy contains copper and tin in the ratio 3 : 2. If 250 gm of copper is added to this alloy then the copper in it becomes double the quantity of tin in it. What is the amount (in gm) of tin in the alloy?
A.	250
B.	750
C.	1000
D.	500
Answer» E.

Discussion

120.	In what ratio must a mixture of 20% milk strength be mixed with that of 60% milk strength so as to get a new mixture of 25% milk strength?
A.	7 : 1
B.	4 : 1
C.	5 : 2
D.	9 : 2
Answer» B. 4 : 1

Discussion

121.	A container having pure milk, 30% is replaced by water and the process is repeated three times. At the end of the third operation, what will be the intensity of milk?
A.	34%
B.	35%
C.	38%
D.	34.3%
E.	36%
Answer» E. 36%

Discussion

122.	In a mixture the ratio of milk to water is 4 : 1. If 30 litre of water is added then new ratio becomes 14 : 11. Calculate the initial mixture?
A.	20 litre
B.	65 litre
C.	70 litre
D.	10 litre
E.	30 litres
Answer» D. 10 litre

Discussion

123.	A and B are solutions of acid and water. The ratios of water and acid in A and B are 4 : 5 and 1 : 2 respectively. If x liters of A is mixed with y liters of B, then the ratio of water and acid in the mixture becomes 8 : 13 What is x : y?
A.	5 : 6
B.	3 : 4
C.	2 : 3
D.	2 : 5
Answer» C. 2 : 3

Discussion

124.	In a mixture of 80 liters of a liquid and water, 25% of the mixture is the liquid. How much water should be added to the mixture so that the liquid becomes 20% of the mixture?
A.	15 litres
B.	20 litres
C.	24 litres
D.	25 litres
Answer» C. 24 litres

Discussion

125.	50 litres of mixture of alcohol and water is in the ratio of 1 : 4 respectively. If 10 litres of mixture is taken off and replaced with 10 litres of water. Then what is the new ratio of alcohol and water respectively?
A.	1 : 4
B.	2 : 11
C.	1 : 5
D.	4 : 21
Answer» E.

Discussion

126.	A shopkeeper mixed 5.3 kg of almonds, 2100 g of raisin, 2.2 kg of cashews and packed the mixture equally into two dozen packets. What is the weight to each packet?
A.	400 g
B.	450 g
C.	500 g
D.	300 g
Answer» B. 450 g

Discussion

127.	Alloy A contains copper and zinc in the ratio 4 ∶ 5 and alloy B contains copper and zinc in the ratio 7 ∶ 2, A and B are taken in the ratio 7 ∶ 4 and melted to form a new alloy. The percentage of copper in the new alloy is closest to:
A.	57.76%
B.	65.25%
C.	56.57%
D.	67.5%
Answer» D. 67.5%

Discussion

128.	200 litres of a mixture contains 15% water and the rest is milk. The amount of milk that must be added so that the resulting mixture contains 87.5% milk is:
A.	45 litres
B.	40 litres
C.	35 litres
D.	30 litres
Answer» C. 35 litres

Discussion

129.	One solution contains 21 grams of salt in 320 ml of water. Find the concentration of the solution in terms of mass according mass-percentage relation?
A.	6.15%
B.	13.05%
C.	8.84%
D.	12.57%
Answer» B. 13.05%

Discussion

130.	A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 ∶ 5
A.	4 litres, 8 litres
B.	6 litres, 6 litres
C.	5 litres, 7 litres
D.	7 litres, 5 litres
Answer» C. 5 litres, 7 litres

Discussion

131.	A shopkeeper bought 6 tonnes of wheat at Rs. 1.80 per kg and sold 4.7 tonnes out of it at rate of Rs. 2 per kg. How much profit will he get if he sells the remaining quantity at Rs. 2.50 per kg?
A.	Rs. 2600
B.	Rs. 1600
C.	Rs. 1850
D.	Rs. 940
Answer» D. Rs. 940

Discussion

132.	A mixture of 30 litres contains milk and water in the ratio of 7 ∶ 3. How much water should be added to it so that the ratio of milk and water becomes 3 ∶ 7?
A.	49 litres
B.	40 litres
C.	63 litres
D.	56 litres
Answer» C. 63 litres

Discussion

133.	An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?
A.	60
B.	80
C.	70
D.	90
Answer» C. 70

Discussion

134.	In a mixture, milk and water are in ratio of 2 : 3. Some milk is added to the mixture because of which ratio of milk and water becomes 2 : 1. How much milk was added as a percentage of initial mixture?
A.	75
B.	60
C.	80
D.	50
Answer» D. 50

Discussion

135.	In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
A.	1 ∶ 2
B.	2 ∶ 1
C.	1 ∶ 3
D.	2 ∶ 3
Answer» B. 2 ∶ 1

Discussion

136.	An alloy A contains two elements, copper and tin in the ratio of 2 : 3, whereas an alloy B contains the same elements in the ratio of 3 : 4. If 20 kg of alloy A, 28 kg of alloy B and some more pure copper are mixed to form a third alloy C which now contains copper and tin in the ratio of 6 : 7, then what is the quantity of the pure copper mixed in the alloy C?
A.	3 kg
B.	4 kg
C.	5 kg
D.	7 kg
Answer» C. 5 kg

Discussion

137.	A mixture of 70 liters of wine and water contain 10% water. How much more water should be added to the mixture to make 37% water in the resulting mixture?
A.	27 litres
B.	18.9 litres
C.	30 litres
D.	63 liters
Answer» D. 63 liters

Discussion

138.	In a mixture of 165 litres, the ratio of liquids X and Y is 6 ∶ 5. If 5 litres of liquid Y is added in the mixture, then what is the ratio of X and Y in the new mixture?
A.	10 ∶ 9
B.	8 ∶ 7
C.	9 ∶ 8
D.	5 ∶ 4
Answer» D. 5 ∶ 4

Discussion

139.	2/3 of a milk-water mixture was milk. There was 21 litres of the mixture. If 4 litres of water is added to it, Then find the percentage of milk in the new mixture.
A.	44
B.	56
C.	14
D.	11
Answer» C. 14

Discussion

140.	In what ratio two types of liquid costing Rs. 52/litre and Rs. 65/litre should be mixed to obtain a mixture of Rs. 60/litre?
A.	8 : 13
B.	5 : 8
C.	1 : 5
D.	8 : 5
Answer» C. 1 : 5

Discussion

141.	In a mixture of 50 liters, milk and water are in the ratio 3 ∶ 2. How much of water should be added to make ratio equal?
A.	20 liters
B.	14 liters
C.	10 liters
D.	15 liters
Answer» D. 15 liters

Discussion

142.	A shopkeeper bought milk at rate of Rs. 26 per litre. He mixed water and sold the mixture for Rs. 26 per litre and gains a profit of 30%. If he bought milk worth Rs. 2,028, then what is the amount of water added?
A.	26.3 litres
B.	25.78 litres
C.	23.4 litres
D.	20.2 litres
E.	None of the above
Answer» D. 20.2 litres

Discussion

143.	A mixture has milk and water in the ratio (by volume) of 8 : 3 If 3 litres of water is added to it, then new ratio of milk and water becomes 2 : 1. What are the quantities of milk and water respectively in the mixture initially?
A.	16 litres and 6 litres
B.	40 litres and 15 litters
C.	24 litres and 9 litres
D.	32 litres and 12 litres
Answer» D. 32 litres and 12 litres

Discussion

144.	In the mixture of 84 liters, the ratio of milk and water is 3 : 4. If this ratio is changed to 3 : 5, then tell the amount of excess water (in liters) mixed in the mixture.
A.	11
B.	13
C.	14
D.	12
Answer» E.

Discussion

145.	In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was:
A.	10 kg
B.	15 kg
C.	20 kg
D.	25 kg
Answer» B. 15 kg

Discussion

146.	In a mixture of 40 litres, the ratio of milk and water is 3 : 2. How many litres of milk must be added to make the ratio 4 : 1?
A.	45
B.	40
C.	35
D.	30
E.	44
Answer» C. 35

Discussion

147.	An alloy X contains by weight copper and tin in the ration 7 : 3 and alloy Y contain copper and tin in the ratio 3 : 2. X and Y are taken in the ratio 4 : 1 and melted to form alloy Z. The percentage of copper in alloy Z is:
A.	70
B.	56
C.	65
D.	68
Answer» E.

Discussion

148.	A mixture contains acid and water in the ratio of 6 ∶ 1. On adding 12 litres of water to the mixture, the ratio of acid to water becomes 3 ∶ 2. The quantity of water (in litres) in the original mixture was:
A.	3.5
B.	6
C.	4
D.	5
Answer» D. 5

Discussion

149.	Alloy A contains iron and copper in ratio 4 : 5. Alloy B contains iron and copper in ratio 3 : 4. If 45 kg of alloy A and 63 kg of alloy B are mixed, then what is the final ratio of copper and iron?
A.	61 : 47
B.	57 : 41
C.	59 : 45
D.	64 : 47
Answer» B. 57 : 41

Discussion

150.	A mixture contains milk and water in the ratio of 5 ∶ 1 On adding 5 liters of water, the ratio of milk to water becomes 5 ∶ 2. The quantity of milk in the original mixture is
A.	16 litres
B.	25 litres
C.	22.75 litres
D.	32.5 litres
Answer» C. 22.75 litres

Discussion

Explore topic-wise MCQs in Vlsi.

In what ratio salt costing Rs. 13/kg mixed with another salt costing Rs. 7/ kg to get a mixture costing Rs 9/kg?

A 20% ethanol solution is mixed with another ethanol solution, say, S of unknown concentration in the proportion 1 : 3 by volume. This mixture is then mixed with an equal volume of 20% ethanol solution. If the resultant mixture is a 31.25% ethanol solution, then the unknown concentration of S is

How much of pure alcohol has to be added to 500 ml of a solution that contains 10% alcohol in order to change the concentration of alcohol in the mixture of 20%?

A jar contains a mixture of 175 ml water and 700 ml alcohol. Gopal takes out 10% of the mixture and substitutes it by water of the same amount. The process is repeated once again. The percentage of water in the mixture is now

How many litres of water should be added to a 7.5 litre mixture of acid and water containing acid and water in the ratio of 1 : 2 such that the resultant mixture has 20% acid in it?

In what ratio must Rs. 50 per kg salt be mixed with Rs. 80 per kg salt to obtain a mixture worth of Rs. 60 per kg.

A shopkeeper mixes two varieties of rice purchased at the rate of Rs. 35 per kg and at the rate of Rs. 28 per kg respectively. If he sells the mixture at the rate of Rs. 36 per kg and gains 20%, then the ratio in which the two varieties are mixed is:

In what ratio should Assam Tea costing Rs. 300 per kg be mixed with Darjeeling Tea costing Rs. 400 per kg, so that by selling the mixture at Rs. 408 per kg there is gain of 20%.

An alloy contains lead and aluminium in the ratio 3 ∶ 5. If lead has 15% impurity and aluminum 55%, what is the average impurity percentage of the alloy?

In what ratio should cement costing Rs. 250 per bag be mixed with cement costing Rs. 325 per bag so that the cost of the mixture is Rs. 300 per bag. (A bag of cement is 50 kg).

In a mixture, ink and water are in the ratio of 8 : 5. If 24 litres of water is added to the mixture, then the new ratio becomes 8 : 11. What is the total quantity (in litres) of water in the new mixture?

In 24 kg of rice, costing Rs. 46 per kg. how much rice costing Rs. 74 per kg should be mixed so that the cost of the mixture is worth Rs. 62 per kg?

In what ratio should water be mixed with wine, that costs Rs. 60 per litre, so that the price of the resultant mixture is Rs.40 per litre?

4 litre of a solution having 10% acid was mixed with 5 litre of a solution having 16% acid. Six litre of pure acid was then added to the resulting solution. The concentration of acid in the final solution is:

In what ratio tea at Rs 240 per kg be mixed with tea at Rs 300 per kg so that on selling the mixture at Rs 336 per kg there is a profit of 20%?

A mixture of 80 liters of wine and water contains 60 percent wine. How much water must be added to make it 50 percent wine in the new mixture?

If 2 litres of water are evaporated on boiling 8 litres of sugar solution containing 6% of sugar, then the percentage of sugar in the remaining solution is :

In what ratio wheat costing Rs. 17/ kg should be mixed with another wheat costing Rs. 12/kg to get a mixture costing Rs. 13.5/ kg?

An alloy contains copper and tin in the ratio 3 : 2. If 250 gm of copper is added to this alloy then the copper in it becomes double the quantity of tin in it. What is the amount (in gm) of tin in the alloy?

In what ratio must a mixture of 20% milk strength be mixed with that of 60% milk strength so as to get a new mixture of 25% milk strength?

A container having pure milk, 30% is replaced by water and the process is repeated three times. At the end of the third operation, what will be the intensity of milk?

In a mixture the ratio of milk to water is 4 : 1. If 30 litre of water is added then new ratio becomes 14 : 11. Calculate the initial mixture?

A and B are solutions of acid and water. The ratios of water and acid in A and B are 4 : 5 and 1 : 2 respectively. If x liters of A is mixed with y liters of B, then the ratio of water and acid in the mixture becomes 8 : 13 What is x : y?

In a mixture of 80 liters of a liquid and water, 25% of the mixture is the liquid. How much water should be added to the mixture so that the liquid becomes 20% of the mixture?

50 litres of mixture of alcohol and water is in the ratio of 1 : 4 respectively. If 10 litres of mixture is taken off and replaced with 10 litres of water. Then what is the new ratio of alcohol and water respectively?

A shopkeeper mixed 5.3 kg of almonds, 2100 g of raisin, 2.2 kg of cashews and packed the mixture equally into two dozen packets. What is the weight to each packet?

Alloy A contains copper and zinc in the ratio 4 ∶ 5 and alloy B contains copper and zinc in the ratio 7 ∶ 2, A and B are taken in the ratio 7 ∶ 4 and melted to form a new alloy. The percentage of copper in the new alloy is closest to:

200 litres of a mixture contains 15% water and the rest is milk. The amount of milk that must be added so that the resulting mixture contains 87.5% milk is:

One solution contains 21 grams of salt in 320 ml of water. Find the concentration of the solution in terms of mass according mass-percentage relation?

A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 ∶ 5

A shopkeeper bought 6 tonnes of wheat at Rs. 1.80 per kg and sold 4.7 tonnes out of it at rate of Rs. 2 per kg. How much profit will he get if he sells the remaining quantity at Rs. 2.50 per kg?

A mixture of 30 litres contains milk and water in the ratio of 7 ∶ 3. How much water should be added to it so that the ratio of milk and water becomes 3 ∶ 7?

An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?

In a mixture, milk and water are in ratio of 2 : 3. Some milk is added to the mixture because of which ratio of milk and water becomes 2 : 1. How much milk was added as a percentage of initial mixture?

In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?

A mixture of 70 liters of wine and water contain 10% water. How much more water should be added to the mixture to make 37% water in the resulting mixture?

In a mixture of 165 litres, the ratio of liquids X and Y is 6 ∶ 5. If 5 litres of liquid Y is added in the mixture, then what is the ratio of X and Y in the new mixture?

2/3 of a milk-water mixture was milk. There was 21 litres of the mixture. If 4 litres of water is added to it, Then find the percentage of milk in the new mixture.

In what ratio two types of liquid costing Rs. 52/litre and Rs. 65/litre should be mixed to obtain a mixture of Rs. 60/litre?

In a mixture of 50 liters, milk and water are in the ratio 3 ∶ 2. How much of water should be added to make ratio equal?

A shopkeeper bought milk at rate of Rs. 26 per litre. He mixed water and sold the mixture for Rs. 26 per litre and gains a profit of 30%. If he bought milk worth Rs. 2,028, then what is the amount of water added?

A mixture has milk and water in the ratio (by volume) of 8 : 3 If 3 litres of water is added to it, then new ratio of milk and water becomes 2 : 1. What are the quantities of milk and water respectively in the mixture initially?

In the mixture of 84 liters, the ratio of milk and water is 3 : 4. If this ratio is changed to 3 : 5, then tell the amount of excess water (in liters) mixed in the mixture.

In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was:

In a mixture of 40 litres, the ratio of milk and water is 3 : 2. How many litres of milk must be added to make the ratio 4 : 1?

An alloy X contains by weight copper and tin in the ration 7 : 3 and alloy Y contain copper and tin in the ratio 3 : 2. X and Y are taken in the ratio 4 : 1 and melted to form alloy Z. The percentage of copper in alloy Z is:

A mixture contains acid and water in the ratio of 6 ∶ 1. On adding 12 litres of water to the mixture, the ratio of acid to water becomes 3 ∶ 2. The quantity of water (in litres) in the original mixture was:

Alloy A contains iron and copper in ratio 4 : 5. Alloy B contains iron and copper in ratio 3 : 4. If 45 kg of alloy A and 63 kg of alloy B are mixed, then what is the final ratio of copper and iron?

A mixture contains milk and water in the ratio of 5 ∶ 1 On adding 5 liters of water, the ratio of milk to water becomes 5 ∶ 2. The quantity of milk in the original mixture is