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Previous Year Question (PYQs)
3
Rakesh says to Mahesh, “I am as old as you were when I was one-third as old as you are.” If the sum of their ages is 60 years, find the present age of Mahesh (in years).
Solution
\[
\text{Let Rakesh's age} = R,\] \[ \text{Mahesh's age} = M
\]
\[
R + M = 60 \quad \cdots (i)
\]
From the statement:
Rakesh says, "I am as old as you were when I was one–third as old as you are."
That means: when Rakesh was \( \tfrac{1}{3}M \), Mahesh's age was \( R \).
So, time passed:
\[
R - \tfrac{1}{3}M
\]
Then Mahesh's age at that time:
\[
M - (R - \tfrac{1}{3}M) = R \quad \cdots (ii)
\]
Now solve equation (ii):
\[
M - R + \tfrac{1}{3}M = R
\]
\[
\tfrac{4}{3}M = 2R
\]
\[
2M = 3R \quad \Rightarrow \quad M = \tfrac{3}{2}R
\]
Substitute in (i):
\[
R + \tfrac{3}{2}R = 60
\]
\[
\tfrac{5}{2}R = 60 \quad \Rightarrow \quad R = 24
\]
\[
M = \tfrac{3}{2} \times 24 = 36
\]
\[
\boxed{\text{Mahesh's present age = 36 years}}
\]
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