If a:b = 7:8 and b:c = 8:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:8 and b:c = 8:11, then a:b:c = ?

A. 7:8:11

B. 7:9:11

C. 6:8:12

D. 14:16:22

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:8, b:c = 8:11 ⇒ a:b:c = 7:8:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 14:10:18

B. 7:6:9

C. 6:5:10

D. 7:5:9

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Correct Answer: Option D

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 #2

If a:b = 2:8 and b:c = 8:4, then a:b:c = ?

A. 4:16:8

B. 2:9:4

C. 1:8:5

D. 2:8:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:4 ⇒ a:b:c = 2:8:4.

This question belongs to: Maths Ratio and Proportion

Question #3

Find the mean proportional between 22 and 16.

A. 18

B. 36

C. 38

D. 21

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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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