If a:b = 7:10 and b:c = 10:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:10 and b:c = 10:11, then a:b:c = ?

A. 14:20:22

B. 6:10:12

C. 7:11:11

D. 7:10:11

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:10, b:c = 10:11 ⇒ a:b:c = 7:10:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 10:12. Their difference is 61. What is their sum?

A. 238

B. 198

C. 99

D. 279

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Correct Answer: Option B

Explanation:
Numbers 10k, 12k. Difference |10-12|k = 61 ⇒ k = 30. Sum = (10+12)k ≈ 198.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 9:5. Their difference is 105. What is their sum?

A. 633

B. 684

C. 574

D. 287

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Correct Answer: Option C

Explanation:
Numbers 9k, 5k. Difference |9-5|k = 105 ⇒ k = 26. Sum = (9+5)k ≈ 574.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 6:6:7

B. 6:7:7

C. 5:6:8

D. 12:12:14

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Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

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