Ratio of present ages of A and B is 3:6. After 11 years, the ratio becomes 5:9. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 3:6. After 11 years, the ratio becomes 5:9. Present age of A is?

A. 62 years

B. 57 years

C. 114 years

D. 49 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 3k and 6k. Then (3k + 11)/(6k + 11) = 5/9. Solving gives k ≈ 19, age of A = 3*19 = 57.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 5:5 and b:c = 5:4, then a:b:c = ?

A. 5:5:4

B. 5:6:4

C. 4:5:5

D. 10:10:8

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 5:5, b:c = 5:4 ⇒ a:b:c = 5:5:4.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 5:8 and b:c = 8:11, then a:b:c = ?

A. 4:8:12

B. 10:16:22

C. 5:8:11

D. 5:9:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:11 ⇒ a:b:c = 5:8:11.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 4:2 in a 368 L mixture. Quantity of milk?

A. 245 L

B. 123 L

C. 490 L

D. 273 L

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Correct Answer: Option A

Explanation:
Total parts = 6. Milk = [4 / (4+2)] × 368 = 245 L.

This question belongs to: Maths Ratio and Proportion

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