If a:b = 2:8 and b:c = 8:12, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:8 and b:c = 8:12, then a:b:c = ?

A. 4:16:24

B. 2:8:12

C. 2:9:12

D. 1:8:13

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:8, b:c = 8:12 ⇒ a:b:c = 2:8:12.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 4:9. Their difference is 73. What is their sum?

A. 260

B. 520

C. 557

D. 656

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Correct Answer: Option B

Explanation:
Numbers 4k, 9k. Difference |4-9|k = 73 ⇒ k = 14. Sum = (4+9)k ≈ 520.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 12:7. Their difference is 51. What is their sum?

A. 228

B. 456

C. 596

D. 504

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Correct Answer: Option B

Explanation:
Numbers 12k, 7k. Difference |12-7|k = 51 ⇒ k = 10. Sum = (12+7)k ≈ 456.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 2:8 and b:c = 8:5, then a:b:c = ?

A. 4:16:10

B. 2:8:5

C. 1:8:6

D. 2:9:5

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 2:8, b:c = 8:5 ⇒ a:b:c = 2:8:5.

This question belongs to: Maths Ratio and Proportion

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