If a:b = 2:5 and b:c = 5:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:5 and b:c = 5:10, then a:b:c = ?

A. 2:5:10

B. 4:10:20

C. 2:6:10

D. 1:5:11

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:5, b:c = 5:10 ⇒ a:b:c = 2:5:10.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 25 and 32.

A. 28

B. 31

C. 57

D. 56

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Correct Answer: Option A

Explanation:
Mean proportional = √(25 × 32) = √(800) = 28.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 7:5 and b:c = 5:9, then a:b:c = ?

A. 14:10:18

B. 7:5:9

C. 6:5:10

D. 7:6:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 7:5, b:c = 5:9 ⇒ a:b:c = 7:5:9.

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. 6:7:7

B. 12:12:14

C. 5:6:8

D. 6:6:7

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Correct Answer: Option D

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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