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. 8:10:24

C. 4:6:12

D. 3:5:13

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

A. 1:7:10

B. 4:14:18

C. 2:7:9

D. 2:8:9

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 3:4 and b:c = 4:6, then a:b:c = ?

A. 2:4:7

B. 3:4:6

C. 6:8:12

D. 3:5:6

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:4, b:c = 4:6 ⇒ a:b:c = 3:4:6.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:9 and b:c = 9:10, then a:b:c = ?

A. 2:9:11

B. 3:9:10

C. 6:18:20

D. 3:10:10

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:10 ⇒ a:b:c = 3:9:10.

This question belongs to: Maths Ratio and Proportion

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