Ratio of present ages of A and B is 4:8. After 8 years, the ratio becomes 6:10. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 4:8. After 8 years, the ratio becomes 6:10. Present age of A is?

A. 37 years

B. 49 years

C. 44 years

D. 88 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 4k and 8k. Then (4k + 8)/(8k + 8) = 6/10. Solving gives k ≈ 11, age of A = 4*11 = 44.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Ratio of present ages of A and B is 7:8. After 12 years, the ratio becomes 8:9. Present age of A is?

A. 70 years

B. 82 years

C. 77 years

D. 154 years

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Correct Answer: Option C

Explanation:
Let ages 7k and 8k. Then (7k + 12)/(8k + 12) = 8/9. Solving gives k ≈ 11, age of A = 7*11 = 77.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 7:8 and b:c = 8:9, then a:b:c = ?

A. 7:9:9

B. 6:8:10

C. 14:16:18

D. 7:8:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 7:8, b:c = 8:9 ⇒ a:b:c = 7:8:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 4:6 in a 273 L mixture. Quantity of milk?

A. 218 L

B. 133 L

C. 109 L

D. 164 L

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Correct Answer: Option C

Explanation:
Total parts = 10. Milk = [4 / (4+6)] × 273 = 109 L.

This question belongs to: Maths Ratio and Proportion

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