Question

An alloy Contain zinc and copper in the ratio 7:9 . Find the weight of copper if it has 31.5 kg of zinc

Answer 1

Answer:

weight of copper in the alloy is 40.5 kg

Step-by-step explanation:

let the ratio of zinc i.e. that is 7 be 7x.

and we have the value of zinc

So we have,

7x= 31.5

x= 31.5/7

x= 315/70

x= 4.5

Now let the ratio of copper be 9x

And we have the value of x

So weight of copper in the alloy = 9× 4.5

= 40.5 the answer