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. 88 years

B. 37 years

C. 44 years

D. 49 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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Practice More Ratio and Proportion Questions

Question #1

If a:b = 4:6 and b:c = 6:12, then a:b:c = ?

A. 8:12:24

B. 3:6:13

C. 4:7:12

D. 4:6:12

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:12 ⇒ a:b:c = 4:6:12.

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 3:6. After 8 years, the ratio becomes 5:8. Present age of A is?

A. 66 years

B. 138 years

C. 69 years

D. 74 years

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Correct Answer: Option C

Explanation:
Let ages 3k and 6k. Then (3k + 8)/(6k + 8) = 5/8. Solving gives k ≈ 23, age of A = 3*23 = 69.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 8:6 and b:c = 6:10, then a:b:c = ?

A. 16:12:20

B. 8:7:10

C. 8:6:10

D. 7:6:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:6, b:c = 6:10 ⇒ a:b:c = 8:6:10.

This question belongs to: Maths Ratio and Proportion

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