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?

An alloy A contains two elements, copper and tin in the ratio of 2 : 3

1.	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

No Comment Found

Related MCQs

A milkman uses three containers for selling milk, their capacities being 40 L, 30 L and 20 L respectively. He fills respectively 87.5%, 80% and 90% of the containers with a mix of milk and water in the ratios, 3 : 2, 5 : 1 and 7 : 2 respectively. What is the ratio of the total quantity of milk to that of water carried by him?
One quality of wheat at Rs. 9.30 per kg is mixed with another quality of a certain rate in the ratio 8 : 7 respectively. If the mixture so formed be worth Rs.10 per kg, then what is the rate per kg of the second quality of wheat?
If a dairy mixes cow’s milk which contains 10% fat with buffalo’s milk which contains20% fat, then the resulting mixture has fat (120/7) % of fat. In what ratio was thecow’s milk mixed with buffalo’s milk?
A grain trader has 100 bags of rice. He sold some bags at 10% profit and rest at 20% profit. His overall profit on selling these 100 bags was 14%. How many bags did he sell at 20% profit?
P and Q are two alloys which are prepared by mixing tin and lead in the ratio of 12 : 5 and 4 : 3 respectively. If equal quantities of alloys are melted to form a third alloy R, then what is the ratio of tin and lead in alloy R?
500 litres of milk solution has 40% milk in it. How much more milk should be added to make it 60% in the solution?
From a jar of wine containing 32 litres, 4 litres is drawn out, and the jar is filled up with water. If the same proportion of wine is further drawn out two more times, what proportion of wine to water will be there in the resulting mixture?
In a 64 liter of mixture of milk and water, the quantity of water is 20 liter and the rest is milk. 1/4th of the mixture is taken out. How much milk should be added in the mixture so that the quantity of milk would be 3 times the quantity of water?
A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much (In fraction of vessel size) of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?
A bowl contains 5 litres of milk. Rajesh removes 20% of the milk and adds 2 litres of water. Mahesh removes 40% of this solution and adds 4 litres of soya sauce. Finally, Ramesh removes 30% of this solution. Find the ratio of milk, water and soya sauce in the bucket now.

Discussion

No Comment Found

Related MCQs

Reply to Comment