A father is thirty times as old as his son. However, 18 years later, he will be only thrice as old as the son. What is the father's present age?
Question and options
A father is thirty times as old as his son. However, 18 years later, he will be only thrice as old as the son. What is the father's present age?
- 20 years
- 21 years
- 25 years
- 40 years
Answer and explanation
Correct answer: D - 40 years
Let son = s, father = 30s. In 18 years: 30s + 18 = 3(s + 18), so 27s = 36, s = 4/3 and father = 40 years. Only 40 fits.
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CUSAT Three-Year LL.B.
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