If a:b = 2:7 and b:c = 7:12, then a:b:c = ? MCQ with Answer and Explanation

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

A. 4:14:24

B. 1:7:13

C. 2:7:12

D. 2:8:12

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 17 and 42.

A. 26

B. 52

C. 59

D. 29

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Correct Answer: Option A

Explanation:
Mean proportional = √(17 × 42) = √(714) = 26.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 5:4:5

B. 10:8:10

C. 5:5:5

D. 4:4:6

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 5:4 and b:c = 4:6, then a:b:c = ?

A. 10:8:12

B. 5:4:6

C. 5:5:6

D. 4:4:7

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:4, b:c = 4:6 ⇒ a:b:c = 5:4:6.

This question belongs to: Maths Ratio and Proportion

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