Zinc and copper are in the ratio 5: 3 in 200 gm of an alloy. How much grams of copper be added to make the ratio as 3: 5?
A. 400/3
B. 1/200
C. 72
D. 66
Solution (By Examveda Team)
Zink earlier = (5 *200) /8 = 125 gm.
Copper earlier = (3 *200) /8 = 75 gm.
Now, Zink is same but copper is to be added to make the ratio 3 :5.
Quantity of Copper added later = (125 *5) /3 = 625/3
So extra copper added = (625/3) - (75) = (625 - 225) /3 = 400/3.
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