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Question

The ratio of weights of zinc and copper in an alloy is 5:8. If the weight of copper in a sample of this alloy is 12 g, what is the weight of zinc?
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Solution

Given : Ratio of weights of zinc and copper = 5 : 8

Let the weight of zinc for 12 g of copper be 'x'.

ZincCopper = 58 = x12
(1 mark)
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> ⇒ x = 5×128

⇒ x = 7.5 g

The weight of zinc is 7.5 g.
(1 Mark)

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