The present age of Ravi's father is four times Ravi's present age . Five years back, Ravi's father was seven times as old as Ravi was at that time. What is the present age of Ravi's father?

Options

A. 84 yr
B. 70 yr
C. 40 yr
D. 35 yr

Answer

C

Explanation

Let age of Arvind = `x yr`
Then, age of Arvind.s father = `4x yr `
According to the question,
`(4x - 5) = 7(x - 5) implies 4x - 5 = 7x - 35 `
`implies 3x = 30 implies x = 10 yr `
`therefore` Arvind.s father.s present age
`= 4 xx 10 = 40 yr`