Ratio of present ages of A and B is 4:6. After 10 years, the ratio becomes 7:8. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 4:6. After 10 years, the ratio becomes 7:8. Present age of A is?

A. 26 years

B. 37 years

C. 64 years

D. 32 years

Answer: Option D

Solution (By JKSSB Mock Tests)

Let ages 4k and 6k. Then (4k + 10)/(6k + 10) = 7/8. Solving gives k ≈ 8, age of A = 4*8 = 32.

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 = 5:9, then a:b:c = ?

A. 5:5:9

B. 10:10:18

C. 5:6:9

D. 4:5:10

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 14:6 and their sum is 644. Find the numbers.

A. 448 and 192

B. 896 and 384

C. 433 and 198

D. 462 and 176

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Correct Answer: Option A

Explanation:
Numbers = 14k and 6k. 14k + 6k = 644 ⇒ k = 32. Thus, numbers are 448 and 192.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 2:8 and b:c = 8:11, then a:b:c = ?

A. 1:8:12

B. 4:16:22

C. 2:8:11

D. 2:9:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:11 ⇒ a:b:c = 2:8:11.

This question belongs to: Maths Ratio and Proportion

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