The ratio between the present ages of X and Y is 4:9 respectively. 2yrs from now, Y’s age will become twice the age of X.What was the difference between their ages five yrs ago?

The ratio between the present ages of X and Y is 4:9 respectively. 2yrs from now, Y’s age will become twice the age of X.What was the difference between their ages five yrs ago?

A 10

B 7

C 12

D 9

Solution

Correct Answer: Option A

4x+2/7x+2 = ½
8x+4 = 9x+2
x = 2
x:y = 8:18
5 yrs ago = 3:13
D = 13-3 = 10