Question

A and b age difference is 12.ratio of a and b is 3:7 .find the valu of b

Answer 1

Answer:

b's age = 12 yrs

Step-by-step explanation:

a's age = x

b's age = y

y - x = 12

x = y - 12

x / y = 3 / 7

7x = 3y

Substituting the value of x,

7(y - 12) = 3y

7y - 84 = 3y

4y = 84

y = 12

b's age = 12 yrs

Hope this helps! :)