If a:b = 7:5 and b:c = 5:12, then a:b:c = ? MCQ with Answer and Explanation

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

A. 6:5:13

B. 7:6:12

C. 14:10:24

D. 7:5:12

Answer: Option D

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 2:3 and b:c = 3:10, then a:b:c = ?

A. 2:3:10

B. 1:3:11

C. 2:4:10

D. 4:6:20

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:10 ⇒ a:b:c = 2:3:10.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:7 and b:c = 7:4, then a:b:c = ?

A. 6:8:4

B. 12:14:8

C. 6:7:4

D. 5:7:5

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:7, b:c = 7:4 ⇒ a:b:c = 6:7:4.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 6:10 and b:c = 10:6, then a:b:c = ?

A. 12:20:12

B. 6:11:6

C. 5:10:7

D. 6:10:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 6:10, b:c = 10:6 ⇒ a:b:c = 6:10:6.

This question belongs to: Maths Ratio and Proportion

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