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

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

A. 39 years

B. 45 years

C. 50 years

D. 90 years

Answer: Option B

Solution (By JKSSB Mock Tests)

Let ages 5k and 5k. Then (5k + 5)/(5k + 5) = 6/7. Solving gives k ≈ 9, age of A = 5*9 = 45.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 3:3 and b:c = 3:6, then a:b:c = ?

A. 3:4:6

B. 3:3:6

C. 6:6:12

D. 2:3:7

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:3, b:c = 3:6 ⇒ a:b:c = 3:3:6.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 5:4:7

B. 4:3:8

C. 5:3:7

D. 10:6:14

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Correct Answer: Option C

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

Question #3

If a:b = 6:6 and b:c = 6:7, then a:b:c = ?

A. 6:6:7

B. 6:7:7

C. 12:12:14

D. 5:6:8

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:6, b:c = 6:7 ⇒ a:b:c = 6:6:7.

This question belongs to: Maths Ratio and Proportion

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