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. 2:5:6

B. 2:4:6

C. 4:8:12

D. 1:4:7

Answer: Option B

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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Milk and water are in ratio 9:3 in a 463 L mixture. Quantity of milk?

A. 347 L

B. 384 L

C. 116 L

D. 694 L

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Correct Answer: Option A

Explanation:
Total parts = 12. Milk = [9 / (9+3)] × 463 = 347 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 2:4:6

B. 3:5:5

C. 3:4:5

D. 6:8:10

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 7:10 and b:c = 10:11, then a:b:c = ?

A. 14:20:22

B. 6:10:12

C. 7:10:11

D. 7:11:11

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 7:10, b:c = 10:11 ⇒ a:b:c = 7:10:11.

This question belongs to: Maths Ratio and Proportion

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