Ratio of present ages of A and B is 5:8. After 6 years, the ratio becomes 6:11. Present age of A is? MCQ with Answer and Explanation

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Ratio of present ages of A and B is 5:8. After 6 years, the ratio becomes 6:11. Present age of A is?

A. 80 years

B. 160 years

C. 85 years

D. 74 years

Answer: Option A

Solution (By JKSSB Mock Tests)

Let ages 5k and 8k. Then (5k + 6)/(8k + 6) = 6/11. Solving gives k ≈ 16, age of A = 5*16 = 80.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 11:9. Their difference is 111. What is their sum?

A. 526

B. 240

C. 560

D. 480

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Correct Answer: Option D

Explanation:
Numbers 11k, 9k. Difference |11-9|k = 111 ⇒ k = 55. Sum = (11+9)k ≈ 480.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 2:10 and b:c = 10:12, then a:b:c = ?

A. 2:10:12

B. 2:11:12

C. 4:20:24

D. 1:10:13

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:10, b:c = 10:12 ⇒ a:b:c = 2:10:12.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 3:5 and b:c = 5:10, then a:b:c = ?

A. 6:10:20

B. 2:5:11

C. 3:5:10

D. 3:6:10

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:5, b:c = 5:10 ⇒ a:b:c = 3:5:10.

This question belongs to: Maths Ratio and Proportion

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