Ravi has spent a quarter `1/4` of his life as a boy, one-fifth `1/5` a youth, one-third `1/3` as man and thirteen (13) years in old age. What is his present age?

Options

A. 70 years
B. 80 years
C. 60 years
D. 65 years

Answer

C

Explanation

Suppose his present age is x years
Accroding to question
`x/4 = x/5 = x/3 = x - 13`
` rArr (15 x + 12 x + 20 x)/(60) = x -13`
`rArr 47x = 60x - 780`
`rArr 60 x - 47x = 780`
`rArr 13x = 780`
` therefore x = 780/13 = 60` years