Ratio of present ages of A and B is 5:4. After 12 years, the ratio becomes 8:5. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 5:4. After 12 years, the ratio becomes 8:5. Present age of A is?

A. 120 years

B. 111 years

C. 230 years

D. 115 years

Answer: Option D

Solution (By JKSSB Mock Tests)

Let ages 5k and 4k. Then (5k + 12)/(4k + 12) = 8/5. Solving gives k ≈ 23, age of A = 5*23 = 115.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:3 and b:c = 3:4, then a:b:c = ?

A. 8:3:4

B. 16:6:8

C. 8:4:4

D. 7:3:5

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:4 ⇒ a:b:c = 8:3:4.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 5:7 and b:c = 7:5, then a:b:c = ?

A. 4:7:6

B. 5:7:5

C. 5:8:5

D. 10:14:10

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:7, b:c = 7:5 ⇒ a:b:c = 5:7:5.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:3 and b:c = 3:5, then a:b:c = ?

A. 2:3:5

B. 2:4:5

C. 1:3:6

D. 4:6:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:5 ⇒ a:b:c = 2:3:5.

This question belongs to: Maths Ratio and Proportion

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