Ratio of present ages of A and B is 4:4. After 6 years, the ratio becomes 5:5. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 4:4. After 6 years, the ratio becomes 5:5. Present age of A is?

A. 81 years

B. 84 years

C. 168 years

D. 89 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 4k and 4k. Then (4k + 6)/(4k + 6) = 5/5. Solving gives k ≈ 21, age of A = 4*21 = 84.

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 22 and 16.

A. 38

B. 21

C. 18

D. 36

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Correct Answer: Option C

Explanation:
Mean proportional = √(22 × 16) = √(352) = 18.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:6 and b:c = 6:7, then a:b:c = ?

A. 6:6:7

B. 6:7:7

C. 5:6:8

D. 12:12:14

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:6, b:c = 6:7 ⇒ a:b:c = 6:6:7.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 7:2 in a 578 L mixture. Quantity of milk?

A. 898 L

B. 473 L

C. 129 L

D. 449 L

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Correct Answer: Option D

Explanation:
Total parts = 9. Milk = [7 / (7+2)] × 578 = 449 L.

This question belongs to: Maths Ratio and Proportion

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