If a:b = 8:4 and b:c = 4:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 8:4 and b:c = 4:6, then a:b:c = ?

A. 16:8:12

B. 7:4:7

C. 8:4:6

D. 8:5:6

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:4, b:c = 4:6 ⇒ a:b:c = 8:4:6.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 2:7 and b:c = 7:12, then a:b:c = ?

A. 1:7:13

B. 2:8:12

C. 4:14:24

D. 2:7:12

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:12 ⇒ a:b:c = 2:7:12.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 7:2 in a 578 L mixture. Quantity of milk?

A. 898 L

B. 473 L

C. 129 L

D. 449 L

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Correct Answer: Option D

Explanation:
Total parts = 9. Milk = [7 / (7+2)] × 578 = 449 L.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:9 and b:c = 9:10, then a:b:c = ?

A. 3:10:10

B. 2:9:11

C. 6:18:20

D. 3:9:10

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 3:9, b:c = 9:10 ⇒ a:b:c = 3:9:10.

This question belongs to: Maths Ratio and Proportion

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