Ashok's mother was 3 times as old as Ashok 5 years ago. After 5 years she will be twice as old as Ashok. How old is Ashok today?

Options

A. 10 years
B. 15 years
C. 20 years
D. 25 years

Answer

C

Explanation

Suppose the present age of Ashok is x years and that of his mother is y years.
5 years ago
3 (x - 5) = (y-5)
`implies 3x - 15 = y - 5`
`implies3x- y = 10" "…..(i)`
5 years hence,
2 (x + 5) = (y + 5)
`implies 2x + 10 = y + 5`
`implies2x -y =-5" "......(ii)`
From equations (i) and (ii)
x=15 years.