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The ratio between the present ages of A and B is 3 : 5. If the ratio of their ages five years after becomes 13 : 20, then the present age of B is:1. 40 years2. 35 years3. 30 years4. 32 years |
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Answer» Correct Answer - Option 2 : 35 years Given: The ratio between the present ages of A and B is 3 : 5. The ratio of their ages five years after becomes 13 : 20. Calculation: Let the proportional ratio be x According to the question, (3x + 5)/(5x + 5) = 13/20 ⇒ 60x + 100 = 65x + 65 ⇒ 5x = 35 ⇒ x = 7 The present age of B = 5x = 5 × 7 = 35 ∴ The present age of B is 35 years. |
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