Ratio of present ages of A and B is 6:5. After 5 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 6:5. After 5 years, the ratio becomes 9:6. Present age of A is?

A. 95 years

B. 180 years

C. 90 years

D. 85 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 6k and 5k. Then (6k + 5)/(5k + 5) = 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

Find the mean proportional between 30 and 36.

A. 66

B. 32

C. 35

D. 64

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Correct Answer: Option B

Explanation:
Mean proportional = √(30 × 36) = √(1080) = 32.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:7 and b:c = 7:9, then a:b:c = ?

A. 1:7:10

B. 4:14:18

C. 2:8:9

D. 2:7:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:9 ⇒ a:b:c = 2:7:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 6:9:6

B. 12:16:12

C. 5:8:7

D. 6:8:6

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

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