An alloy contains only zinc and copper and they are in the ratio of 7: 9. If the alloy is 8 kg. Then find the weight of copper in the alloy.
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the answer is below:
Step-by-step explanation:
1) 7:9 meant it has 7x zinc and 9x copper.
2) 7x + 9x = 13x
13x = 8 kg
x = 8/13 kg
copper is 9x.
9x = 8×9/13
=5.53 kg of copper is present in 8kg of alloy.
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