Let the age of Monu’s father be x years
According to the question
Age of Monu = x – 29 years
And age of Monu’s grandfather = x + 26
Adding all of these,
x + x - 29 + x + 26 = 135
⇒ 3x = 135 + 3
\(\Rightarrow \text{x}=\frac{138}{3}=46\)
So, Monu' s father is 46 Years
and Monu is 46 - 29 = 17 years
Monu’s grandfather is 46 + 26 = 72 years