Ratio of present ages of A and B is 7:5. After 12 years, the ratio becomes 8:8. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 7:5. After 12 years, the ratio becomes 8:8. Present age of A is?

A. 103 years

B. 196 years

C. 98 years

D. 94 years

Answer: Option C

Solution (By JKSSB Mock Tests)

Let ages 7k and 5k. Then (7k + 12)/(5k + 12) = 8/8. Solving gives k ≈ 14, age of A = 7*14 = 98.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 5:5 and b:c = 5:4, then a:b:c = ?

A. 4:5:5

B. 5:5:4

C. 10:10:8

D. 5:6:4

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:5, b:c = 5:4 ⇒ a:b:c = 5:5:4.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 5:7 in a 476 L mixture. Quantity of milk?

A. 396 L

B. 198 L

C. 278 L

D. 230 L

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Correct Answer: Option B

Explanation:
Total parts = 12. Milk = [5 / (5+7)] × 476 = 198 L.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 8:7 and b:c = 7:12, then a:b:c = ?

A. 8:8:12

B. 8:7:12

C. 16:14:24

D. 7:7:13

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:7, b:c = 7:12 ⇒ a:b:c = 8:7:12.

This question belongs to: Maths Ratio and Proportion

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