Question

The ratio of weights of copper and zinc in bross is $13:7$. Find the weight of the zinc in a brass utensil weighing $700$ gm.

Answer 1

Let the numbers in the ratio be $13x$ and $7x$

It means weight of copper $=13x$

Weight of zinc $=7x$

Given,

Weight of brass $=700gm$

According to the question,

$13x+7x=700$

$20x=700$

$x=35$

Therefore,

Weight of copper $=13x=13\times 35=455grams$

Weight of zinc $=7x=7\times 35=245grams$

Hence, this is the answer.