In 1 kg of mixture of sand and iron, 20% is iron. How much sand should – McqOptions

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1.	In 1 kg of mixture of sand and iron, 20% is iron. How much sand should be added so that the proportion of iron becomes 10%?
A.	1 kg
B.	200 gm
C.	800 gm
D.	1.8 kg
Answer» B. 200 gm

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