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. 196 years

B. 103 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

Find the mean proportional between 22 and 51.

A. 66

B. 73

C. 33

D. 36

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Correct Answer: Option C

Explanation:
Mean proportional = √(22 × 51) = √(1122) = 33.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 7 and 35.

A. 42

B. 15

C. 30

D. 18

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Correct Answer: Option B

Explanation:
Mean proportional = √(7 × 35) = √(245) = 15.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 5:3 and b:c = 3:7, then a:b:c = ?

A. 5:4:7

B. 4:3:8

C. 10:6:14

D. 5:3:7

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:3, b:c = 3:7 ⇒ a:b:c = 5:3:7.

This question belongs to: Maths Ratio and Proportion

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