Question
Download Solution PDFThe ratio of the present age of father to that of his son is 7 : 2. If after 10 years the ratio of their ages will become 9 : 4, then the present age of the father is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The ratio of the present age of the father to that of his son = F : S = 7 : 2.
Calculation:
Let the present age of the father (F) = 7x
the present age of son (S) = 2x
According to the question:
⇒ (7x + 10)/(2x + 10) = 9/4
⇒ 28x + 40 = 18x + 90
⇒ 28x - 18x = 90 - 40
⇒ 10x = 50
⇒ x = 5
So, the present age of the father (F) = 7x = 7 × 5 = 35 years.
∴ The correct answer is 35 years.
Last updated on Jul 15, 2025
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