Ratio of present ages of A and B is 6:4. After 5 years, the ratio becomes 9:7. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 6:4. After 5 years, the ratio becomes 9:7. Present age of A is?

A. 114 years

B. 119 years

C. 228 years

D. 108 years

Answer: Option A

Solution (By JKSSB Mock Tests)

Let ages 6k and 4k. Then (6k + 5)/(4k + 5) = 9/7. Solving gives k ≈ 19, age of A = 6*19 = 114.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 4:10 and b:c = 10:6, then a:b:c = ?

A. 4:11:6

B. 8:20:12

C. 3:10:7

D. 4:10:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:10, b:c = 10:6 ⇒ a:b:c = 4:10:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 12:10 and their sum is 753. Find the numbers.

A. 408 and 340

B. 816 and 680

C. 429 and 320

D. 396 and 345

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Correct Answer: Option A

Explanation:
Numbers = 12k and 10k. 12k + 10k = 753 ⇒ k = 34. Thus, numbers are 408 and 340.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:5 and b:c = 5:10, then a:b:c = ?

A. 2:5:10

B. 4:10:20

C. 2:6:10

D. 1:5:11

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:5, b:c = 5:10 ⇒ a:b:c = 2:5:10.

This question belongs to: Maths Ratio and Proportion

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