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

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

A. 8:8:10

B. 7:8:11

C. 16:16:20

D. 8:9:10

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 4:12. Their difference is 122. What is their sum?

A. 338

B. 244

C. 208

D. 104

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Correct Answer: Option C

Explanation:
Numbers 4k, 12k. Difference |4-12|k = 122 ⇒ k = 15. Sum = (4+12)k ≈ 208.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 6:10 and b:c = 10:8, then a:b:c = ?

A. 6:10:8

B. 6:11:8

C. 5:10:9

D. 12:20:16

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:10, b:c = 10:8 ⇒ a:b:c = 6:10:8.

This question belongs to: Maths Ratio and Proportion

Question #3

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Find the mean proportional between 20 and 62.

A. 82

B. 38

C. 70

D. 35

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Correct Answer: Option D

Explanation:
Mean proportional = √(20 × 62) = √(1240) = 35.

This question belongs to: Maths Ratio and Proportion

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