a) 16, 28, 36
b) 20, 35, 45
c) 8, 20, 28
d) None of these
Answer: a
Explanation: Let their present ages be 4x, 7x and 9x years respectively.
Then, (4x – 8) + (7x – 8) + (9x – 8) = 56
⇒ 20x = 80
⇒ x = 4
Their present ages are 4x = 16 years, 7x = 28 years and 9x = 36 years respectively.
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