If a:b = 4:5 and b:c = 5:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:5 and b:c = 5:12, then a:b:c = ?

A. 4:5:12

B. 3:5:13

C. 8:10:24

D. 4:6:12

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:5, b:c = 5:12 ⇒ a:b:c = 4:5:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 7:5 and b:c = 5:8, then a:b:c = ?

A. 6:5:9

B. 7:5:8

C. 14:10:16

D. 7:6:8

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 7:5, b:c = 5:8 ⇒ a:b:c = 7:5:8.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:7 and b:c = 7:12, then a:b:c = ?

A. 1:7:13

B. 2:8:12

C. 4:14:24

D. 2:7:12

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:12 ⇒ a:b:c = 2:7:12.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 14:8:8

B. 6:4:5

C. 7:5:4

D. 7:4:4

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

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