Ratio of present ages of A and B is 6:4. After 9 years, the ratio becomes 9:6. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 6:4. After 9 years, the ratio becomes 9:6. Present age of A is?

A. 180 years

B. 90 years

C. 83 years

D. 95 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 6k and 4k. Then (6k + 9)/(4k + 9) = 9/6. Solving gives k ≈ 15, age of A = 6*15 = 90.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

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

A. 8:8:12

B. 4:5:6

C. 3:4:7

D. 4:4:6

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 8:9 and b:c = 9:8, then a:b:c = ?

A. 7:9:9

B. 8:9:8

C. 16:18:16

D. 8:10:8

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:9, b:c = 9:8 ⇒ a:b:c = 8:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:8 and b:c = 8:5, then a:b:c = ?

A. 4:16:10

B. 2:9:5

C. 1:8:6

D. 2:8:5

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:5 ⇒ a:b:c = 2:8:5.

This question belongs to: Maths Ratio and Proportion

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