If a:b = 4:5 and b:c = 5:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:5 and b:c = 5:8, then a:b:c = ?

A. 4:6:8

B. 3:5:9

C. 8:10:16

D. 4:5:8

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:5, b:c = 5:8 ⇒ a:b:c = 4:5:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 6:9 and b:c = 9:6, then a:b:c = ?

A. 12:18:12

B. 6:9:6

C. 5:9:7

D. 6:10:6

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:6 ⇒ a:b:c = 6:9:6.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 5:3 and b:c = 3:4, then a:b:c = ?

A. 10:6:8

B. 5:4:4

C. 4:3:5

D. 5:3:4

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:3, b:c = 3:4 ⇒ a:b:c = 5:3:4.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:7 and b:c = 7:4, then a:b:c = ?

A. 8:14:8

B. 3:7:5

C. 4:7:4

D. 4:8:4

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:7, b:c = 7:4 ⇒ a:b:c = 4:7:4.

This question belongs to: Maths Ratio and Proportion

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