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Answer :
Let Shobo’s present age be x years.
And Shobo’s mother’s age = 6x years.
After 5 years Shobo’s age=(x + 5) years.
As per the condition given, we have
x + 5 =\( \frac { 1 }{ 3 }\) × 6x
\(\Rightarrow\) x + 5 = 2x
\(\Rightarrow\) 5 = 2x – x (Transposing x to RHS)
\(\Rightarrow\) 5 = x
Hence, Shobo’s present age = 5 years
and Shobo’s mother’s present age 6x = 6 × 5 = 30 years.