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. 2:9:12

C. 2:8:12

D. 1:8:13

Answer: Option C

Solution (By JKExamLibrary)

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

If a:b = 3:8 and b:c = 8:8, then a:b:c = ?

A. 3:8:8

B. 2:8:9

C. 6:16:16

D. 3:9:8

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:8, b:c = 8:8 ⇒ a:b:c = 3:8:8.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 15:4 and their sum is 182. Find the numbers.

A. 155 and 15

B. 270 and 72

C. 135 and 36

D. 118 and 54

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Correct Answer: Option C

Explanation:
Numbers = 15k and 4k. 15k + 4k = 182 ⇒ k = 9. Thus, numbers are 135 and 36.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 8:3 and b:c = 3:4, then a:b:c = ?

A. 8:4:4

B. 7:3:5

C. 8:3:4

D. 16:6:8

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:4 ⇒ a:b:c = 8:3:4.

This question belongs to: Maths Ratio and Proportion

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