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The ratio of age of Rina and Babita 5 years before was 1 : 2 and the ratio of their present age is 7 : 9 find the present age of Babita.1. 9 years2. 5 years3. 6 years4. 7 years |
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Answer» Correct Answer - Option 1 : 9 years Given: Age ratio of Rina and Babita (5 years before) = 1 : 2 Ratio of their present age = 7 : 9 Calculations: Let the present ages of Rina and Babita be 7x and 9x So, the ratio of their ages 5 years ago: (7x – 5) ∶ (9x – 5) = 1 ∶ 2 ⇒ 14x – 10 = 9x – 5 ⇒ x = 1 ∴ The present age of Babita is 9 × 1 = 9 years |
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