The ratio between the present ages of A and B is 3 : 5. If the ratio of their ages five years hence becomes 13 : 20, then the present age of B is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 35 years
Let the present age of A and B be 3x and 5x.
Their ages after 5 years.
A = 3x + 5, B = 5x + 5.
(3x + 5)/(5x + 5) = 13/20
On solving further we get,
x = 7.
Present age of B = 5x = 5 × 7 = 35 years.