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1. The present age of three persons are in the proportion of 4:7:9. Eight years ago, the sum of their ages was 56 years. The present age of the eldest person is -
- A. 28
- B. 28
- C. 28
- D. 28
Answer: Option B
Explanation:
Let their present ages be 4x, 7 x and 9x years respectively.
Then, (4x - 8) + (7 x - 8) + (9x + 8) =56⇔20x = 80
x = 4
∴ Their present ages are 16 years, 28 years and 36 years respectively.
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