If a:b = 2:4 and b:c = 4:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:4 and b:c = 4:7, then a:b:c = ?

A. 1:4:8

B. 2:4:7

C. 2:5:7

D. 4:8:14

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:4, b:c = 4:7 ⇒ a:b:c = 2:4:7.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 3:10 and b:c = 10:11, then a:b:c = ?

A. 6:20:22

B. 3:10:11

C. 2:10:12

D. 3:11:11

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:10, b:c = 10:11 ⇒ a:b:c = 3:10:11.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 7:5 and b:c = 5:12, then a:b:c = ?

A. 7:5:12

B. 7:6:12

C. 6:5:13

D. 14:10:24

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 7:5, b:c = 5:12 ⇒ a:b:c = 7:5:12.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:9 and b:c = 9:12, then a:b:c = ?

A. 6:18:24

B. 3:10:12

C. 3:9:12

D. 2:9:13

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:12 ⇒ a:b:c = 3:9:12.

This question belongs to: Maths Ratio and Proportion

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