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Answer :
Let the age of Baichung be x years.
As given,the age of his father = x + 29 years,
and the age of his grandfather = x + 29 + 26 = (x + 55) years.
As per the conditions given, we get
x + x + 29 + x + 55 = 135
\(\Rightarrow\) 3x + 84 = 135
\(\Rightarrow\) 3x = 135 – 84 (transposing 84 to RHS)
\(\Rightarrow\) 3x = 51
\(\Rightarrow\) x = 51 ÷ 3 (transposing 3 to RHS)
\(\Rightarrow\)x = 17
Hence Baichung’s age = 17 years
Baichung’s father’s age = 17 + 29 = 46 years,
and grand father’s age = 46 + 26 = 72 years.