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The ratio of the age of Ravi and Rahim 10 years ago was 1 : 3. The ratio of their age five years hence will be 2 : 3. Then the ratio of their present age will be.1. 1 : 32. 2 : 33. 3 : 54. 3 : 2 |
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Answer» Correct Answer - Option 3 : 3 : 5 Given: The ratio of the age of Ravi and Rahim 10 years ago was 1 : 3. The ratio of their age five years hence will be 2 : 3. Concept used: Ratio and proportion Calculation: Let the age of Ravi and Rahim 10 years ago be x and 3x years. After 5 years from now, ⇒ \(\frac{{x + 15}}{{3x + 15}} = \frac{2}{3}\) ⇒ 3x + 45 = 6x + 30 ⇒ 3x = 15 ⇒ x = 5 The ratio of their present age ⇒ \(\frac{{x + 10}}{{3x + 10}}\) ⇒ 15 : 25 ∴ 3 : 5 will be their present age. |
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