If a:b = 4:8 and b:c = 8:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:8 and b:c = 8:7, then a:b:c = ?

A. 8:16:14

B. 3:8:8

C. 4:8:7

D. 4:9:7

Answer: Option C

Solution (By JKExamLibrary)

Combine ratios: a:b = 4:8, b:c = 8:7 ⇒ a:b:c = 4:8:7.

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 = 6:5 and b:c = 5:4, then a:b:c = ?

A. 6:6:4

B. 5:5:5

C. 12:10:8

D. 6:5:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 6:5, b:c = 5:4 ⇒ a:b:c = 6:5:4.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 4:8 and b:c = 8:8, then a:b:c = ?

A. 8:16:16

B. 4:8:8

C. 3:8:9

D. 4:9:8

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:8, b:c = 8:8 ⇒ a:b:c = 4:8:8.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Find the mean proportional between 22 and 16.

A. 18

B. 38

C. 21

D. 36

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Correct Answer: Option A

Explanation:
Mean proportional = √(22 × 16) = √(352) = 18.

This question belongs to: Maths Ratio and Proportion

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