Question

Ajit is 21 years younger than his father. What is their total age in 7 years time ?
A) (x+28) years
B) (x+35) years
C) (2x+28) years
D) (2x+35) years

Answer 1

Hint:Calculate the age of both Ajit and his father in 7 years taking Ajit’s present age x and his father’s present age x+21. Add to get the total age in 7 years.

Complete step-by-step answer:
Let Ajit’s present age be x years
Ajit’s father age at present = x+21
Therefore after 7 years,
Ajit’s age = x + 7
Ajit’s father age = ( x+21 ) + 7
Therefore their total age = Ajit’s age + Ajit’s father age
= x + 7 + x + 21 + 7 = 2x + 35
Total age = 2x + 35 in 7 years.

Note: In such types of questions we must recall how to calculate the age after a period of time and use it accurately to get the desired answer.