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After five years the age of a father will be thrice the age of his son whereas five years ago, he was seven times as old as his son was. What is father's present age ?
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- 35 years
- 40 years
- 45 years
- 50 years
Correct Option: B
Let son's age 5 years hence = x years
Then, father's age after 5 years hence = 3x years
∵ 7(x - 10) = (3x - 10)
⇒ x(7 - 3) = 70 - 80
⇒ x = 15
∴ Father's present age = (3x - 5) = 40 years
