If a:b = 7:10 and b:c = 10:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:10 and b:c = 10:12, then a:b:c = ?

A. 6:10:13

B. 7:11:12

C. 7:10:12

D. 14:20:24

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:10, b:c = 10:12 ⇒ a:b:c = 7:10:12.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Milk and water are in ratio 6:5 in a 226 L mixture. Quantity of milk?

A. 246 L

B. 153 L

C. 123 L

D. 103 L

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Correct Answer: Option C

Explanation:
Total parts = 11. Milk = [6 / (6+5)] × 226 = 123 L.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:3 and b:c = 3:9, then a:b:c = ?

A. 4:6:18

B. 2:4:9

C. 1:3:10

D. 2:3:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:3, b:c = 3:9 ⇒ a:b:c = 2:3:9.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:5 and b:c = 5:9, then a:b:c = ?

A. 3:5:9

B. 3:6:9

C. 2:5:10

D. 6:10:18

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:5, b:c = 5:9 ⇒ a:b:c = 3:5:9.

This question belongs to: Maths Ratio and Proportion

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