Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 3:4. After 4 years, the ratio becomes 5:6. Present age of A is?

A. 60 years

B. 66 years

C. 132 years

D. 71 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 3k and 4k. Then (3k + 4)/(4k + 4) = 5/6. Solving gives k ≈ 22, age of A = 3*22 = 66.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 7:9 and b:c = 9:5, then a:b:c = ?

A. 14:18:10

B. 7:9:5

C. 6:9:6

D. 7:10:5

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 7:9, b:c = 9:5 ⇒ a:b:c = 7:9:5.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 7:7 in a 233 L mixture. Quantity of milk?

A. 117 L

B. 138 L

C. 116 L

D. 232 L

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Correct Answer: Option C

Explanation:
Total parts = 14. Milk = [7 / (7+7)] × 233 = 116 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 12:8 and their sum is 523. Find the numbers.

A. 333 and 191

B. 624 and 416

C. 312 and 208

D. 294 and 220

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Correct Answer: Option C

Explanation:
Numbers = 12k and 8k. 12k + 8k = 523 ⇒ k = 26. Thus, numbers are 312 and 208.

This question belongs to: Maths Ratio and Proportion

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