Question

in an alloy of German Silver the ratio of copper to zinc was 17 :7 while that of nickel to zinc was 4:3 .the ratio of copper to zinc to Nickel in the alloy was?

Answer 1

Lets analyze the ratios.

Copper to Zinc = 17 : 7

Nickel to Zinc = 4 : 3

Zinc is common in both and hence we make it have same value in both ratios.

We therefore get the LCM of 3 and 7

The LCM of 3 and 7 is  21

So we multiply the first ratio by 3 and the second one by 7.

Doing this we have :

Copper to Zinc = 51 : 21

Nickel to Zinc = 28 : 21

Now :

Copper to Zinc to Nickel is :

= 51 : 21 : 28