If a:b = 2:8 and b:c = 8:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:8 and b:c = 8:10, then a:b:c = ?

A. 4:16:20

B. 2:9:10

C. 2:8:10

D. 1:8:11

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:8, b:c = 8:10 ⇒ a:b:c = 2:8:10.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 11:9. Their difference is 111. What is their sum?

A. 240

B. 526

C. 560

D. 480

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Correct Answer: Option D

Explanation:
Numbers 11k, 9k. Difference |11-9|k = 111 ⇒ k = 55. Sum = (11+9)k ≈ 480.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 8:9 and b:c = 9:8, then a:b:c = ?

A. 8:10:8

B. 8:9:8

C. 7:9:9

D. 16:18:16

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:9, b:c = 9:8 ⇒ a:b:c = 8:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in ratio 7:12. Their difference is 120. What is their sum?

A. 551

B. 275

C. 658

D. 593

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Correct Answer: Option A

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 120 ⇒ k = 24. Sum = (7+12)k ≈ 551.

This question belongs to: Maths Ratio and Proportion

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