a) 18 years
b) 20 years
c) 24 years
d) 32 years
Answer: a
Explanation: Let the present age of the man be x years
$$\eqalign{
& {\text{3}}\left( {x + 3} \right) – 3\left( {x – 3} \right) = x \cr
& \left( {3x + 9} \right) – \left( {3x – 9} \right) = x \cr
& x = 18 \cr} $$
The present age of the man is 18 years
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