Ratio of present ages of A and B is 5:8. After 12 years, the ratio becomes 6:11. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 5:8. After 12 years, the ratio becomes 6:11. Present age of A is?

A. 110 years

B. 60 years

C. 55 years

D. 50 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 5k and 8k. Then (5k + 12)/(8k + 12) = 6/11. Solving gives k ≈ 11, age of A = 5*11 = 55.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

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

A. 4:4:6

B. 5:4:5

C. 10:8:10

D. 5:5:5

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Correct Answer: Option B

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 #2

Two numbers are in ratio 9:4. Their difference is 113. What is their sum?

A. 143

B. 395

C. 326

D. 286

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Correct Answer: Option D

Explanation:
Numbers 9k, 4k. Difference |9-4|k = 113 ⇒ k = 22. Sum = (9+4)k ≈ 286.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:6 and b:c = 6:8, then a:b:c = ?

A. 4:6:8

B. 3:6:9

C. 4:7:8

D. 8:12:16

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:8 ⇒ a:b:c = 4:6:8.

This question belongs to: Maths Ratio and Proportion

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