If a:b = 5:8 and b:c = 8:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:8 and b:c = 8:11, then a:b:c = ?

A. 5:8:11

B. 4:8:12

C. 10:16:22

D. 5:9:11

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:8, b:c = 8:11 ⇒ a:b:c = 5:8:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 2:9 and b:c = 9:7, then a:b:c = ?

A. 1:9:8

B. 4:18:14

C. 2:10:7

D. 2:9:7

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:9, b:c = 9:7 ⇒ a:b:c = 2:9:7.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 22 and 16.

A. 21

B. 38

C. 36

D. 18

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:4 and b:c = 4:9, then a:b:c = ?

A. 3:4:10

B. 4:5:9

C. 8:8:18

D. 4:4:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 4:4, b:c = 4:9 ⇒ a:b:c = 4:4:9.

This question belongs to: Maths Ratio and Proportion

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