If a:b = 7:6 and b:c = 6:7, then a:b:c = ? MCQ with Answer and Explanation

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

A. 7:6:7

B. 6:6:8

C. 7:7:7

D. 14:12:14

Answer: Option A

Solution (By JKExamLibrary)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

If a:b = 3:4 and b:c = 4:6, then a:b:c = ?

A. 6:8:12

B. 3:4:6

C. 2:4:7

D. 3:5:6

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:4, b:c = 4:6 ⇒ a:b:c = 3:4:6.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 8:3 and b:c = 3:9, then a:b:c = ?

A. 7:3:10

B. 8:4:9

C. 16:6:18

D. 8:3:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:9 ⇒ a:b:c = 8:3:9.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

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. 32 years

C. 37 years

D. 64 years

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Correct Answer: Option B

Explanation:
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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