A:B is 3:5 , B:C is 2:1 ,

Question

so whats the ratio of A:B:C?

Answer 1

A : B = 3 : 5 and

B : C = 2 : 1.

To find A : B : C, first find the least common multiples of 5 and 2.

The L.C.M of 5 and 2 is 10.

Convert the ratios so that each have B as 10.

A : B = 3 : 5  →  * 2

B : C = 2 : 1 → * 5

Then, the ratios are

A : B = 6 : 10

B : C = 10 : 5

⇒ A : B : C = 6 : 10 : 5.