Correct Answer - Option 2 : 28 years
Given∶
Krish is 4 years older than Raj
Raj is 4 times as old as Prem.
Sum of the ages of Krish, Raj and Prem be 67
Formula Used∶
Concept of Linear Equations and Simplification.
Calculation∶
Let us assume the age of Raj be ‘x’ years
Then, age of Krish = (x + 4) years
And Prem’s age = (x/4) years
According to question,
x + x + 4 + x/4 = 67
⇒ (4x + 4x + 16 + x)/4 = 67
⇒ 9x + 16 = 268
⇒ 9x = 252
⇒ x = 28
∴ The present age of Raj is 28 years.