Question

The respective ratio between the present ages of a and b is 1 : 3 and that of b and c is 9 : 7 10 years ago, the sum of the ages of a and c then was 20 years. Find bs present age.

Answer 1

Answer: 36Years

Step-by-step explanation: I will provide you a simple trick for solving ratio question

A:B:C

1:3:3

9:9:7

_______(multiple)

9:27:21

10year ago a nd c ave sum is 20yrs .So now it's present age some is 40Yrs

Sum the ratio of a nd c (9+21=30)

30R=40

1R =4/3

B present age is 27R

27R= 27 X 4/3 = 9x4

B = 36year Present age.

Hope it's help uh.

Thank-you.