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Zinc and copper are in the ratio of 5 : 3 in 200 gm of an alloy. How much grams of copper be
added to make the ratio as 3 : 5?
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133 1 3 -
1 200 - 72
- 66
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Correct Option: A
Weight of zinc
| = 200 × | = 125 gram | |
| 8 |
Weight of copper
| = 200 × | = 75 gram | |
| 8 |
Let the ratio of 125 gram zinc and x gram copper be 3 : 5
| ∴ | = | ||
| x | 5 |
| ∴ x = | = | gram | ||
| 3 | 3 |
∴ Addition of copper in mixture
| = | − 75 = | ||
| 3 | 3 |
| = | = 133 | gram. | ||
| 3 | 3 |
