Question

The ratio of zinc and copper in an alloy is 2 ratio 7 if the weight of copper in a sample of alloy is 10.5 grams then what is the amount of zinc in it

Answer 1

Step-by-step explanation:

Zinc:copper=2:7=2x:7x (assuming x is common in the ratio)

Let the amount of Zinc in the sample be z

Then,

2:7=z:10.5

Z=2*10.5/7=21/7=3

Therefore there is 3g of Zinc in the sample