Question

Rajeev's age after 15 years will be 5 times his age 5 years back. What is the present age of rajeev?
A) 12
B) 14
C) 22
D) 10

Answer 1

Let Rajeev's present age be x years. ThenRajeev's age 15 years= (x+15) years.Rajeev's age 5 years back= (x-5) years.Therefore‹=› x+15=5(x-5)‹=› x+15= 5x-25‹=› 4x=40‹=› x=10.

Answer 2

Q:

Rajeev's age after 15 years will be 5 times his age 5 years back. What is the present age of rajeev?

A) 12
B) 14
C) 22
D) 10

Answer:   D) 10 

Read Description:

Let Rajeev's present age be k years.

Rajeev's age after 15 years = (k + 15) years.

Rajeev's age 5 years back = (k - 5) years

Then ATQ, 

k + 15 = 5 (k - 5)
k + 15 = 5k - 25
=> k = 10
 
Hence, Rajeev's present age = k = 10 years.