Question

If 10.5 gm of an alloy of copper and zinc contains 2.1 gm of zinc , find the weight of the copper in 42 gm of the alloy.

Answer 1

Answer:

Step-by-step explanation:

Zinc= 2.1gm

Copper= 8.4gm

Ratio of Zinc to Copper=1/4

Sum of Zinc n Copper=5 parts

In new alloy weights=42gm

5parts= 42gm

Zinc=42/5= 8.4 gm

Copper=8.4*4= 33.6 gm