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. 57 years

B. 62 years

C. 49 years

D. 114 years

Answer: Option A

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 = 2:4 and b:c = 4:9, then a:b:c = ?

A. 2:4:9

B. 2:5:9

C. 1:4:10

D. 4:8:18

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:9 ⇒ a:b:c = 2:4:9.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 4:4:6

B. 10:8:10

C. 5:5:5

D. 5:4:5

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 7:4 and b:c = 4:8, then a:b:c = ?

A. 6:4:9

B. 14:8:16

C. 7:5:8

D. 7:4:8

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 7:4, b:c = 4:8 ⇒ a:b:c = 7:4:8.

This question belongs to: Maths Ratio and Proportion

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