If a:b = 4:8 and b:c = 8:10, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:8 and b:c = 8:10, then a:b:c = ?

A. 4:8:10

B. 8:16:20

C. 4:9:10

D. 3:8:11

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:8, b:c = 8:10 ⇒ a:b:c = 4:8:10.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 7:9 and b:c = 9:5, then a:b:c = ?

A. 7:9:5

B. 14:18:10

C. 6:9:6

D. 7:10:5

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 7:9, b:c = 9:5 ⇒ a:b:c = 7:9:5.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 10 and 48.

A. 58

B. 24

C. 42

D. 21

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Correct Answer: Option D

Explanation:
Mean proportional = √(10 × 48) = √(480) = 21.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:4 and b:c = 4:6, then a:b:c = ?

A. 3:5:6

B. 3:4:6

C. 6:8:12

D. 2:4:7

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:4, b:c = 4:6 ⇒ a:b:c = 3:4:6.

This question belongs to: Maths Ratio and Proportion

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