If a:b = 2:4 and b:c = 4:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 2:4 and b:c = 4:6, then a:b:c = ?

A. 4:8:12

B. 2:5:6

C. 2:4:6

D. 1:4:7

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:4, b:c = 4:6 ⇒ a:b:c = 2:4:6.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 8:14 and their sum is 276. Find the numbers.

A. 96 and 168

B. 84 and 185

C. 125 and 139

D. 192 and 336

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Correct Answer: Option A

Explanation:
Numbers = 8k and 14k. 8k + 14k = 276 ⇒ k = 12. Thus, numbers are 96 and 168.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 8:6 and b:c = 6:9, then a:b:c = ?

A. 8:6:9

B. 16:12:18

C. 8:7:9

D. 7:6:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 8:6, b:c = 6:9 ⇒ a:b:c = 8:6:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 10:18:14

B. 5:9:7

C. 5:10:7

D. 4:9:8

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Correct Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

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