Question

The ratio of weights of Copper and Zinc in brass is 13:7 find the weight of zinc in a bras utensil weighing 700 gram.

Answer 1

Ratio of weights of copper and zinc in brass is 13 : 7 .
Let proportionality constant is x
then, weight of copper = 13x
weight of zinc = 7x

A/C to question,
Given, weight of brass = 700 gm
weight of copper in brass + weight of zinc in brass = 700 gm
=> 13x + 7x = 700
=> 20x = 700
=> x = 35

hence, weight of copper in brass = 13 × 35 = 455 gm
weight of zinc in brass= 7×35=245 gm
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