If a:b = 5:9 and b:c = 9:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:9 and b:c = 9:6, then a:b:c = ?

A. 4:9:7

B. 5:9:6

C. 10:18:12

D. 5:10:6

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:9, b:c = 9:6 ⇒ a:b:c = 5:9:6.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 15 and 43.

A. 58

B. 25

C. 28

D. 50

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Correct Answer: Option B

Explanation:
Mean proportional = √(15 × 43) = √(645) = 25.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 2:4 and b:c = 4:7, then a:b:c = ?

A. 1:4:8

B. 4:8:14

C. 2:4:7

D. 2:5:7

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:7 ⇒ a:b:c = 2:4:7.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 8:5 in a 369 L mixture. Quantity of milk?

A. 454 L

B. 142 L

C. 227 L

D. 248 L

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Correct Answer: Option C

Explanation:
Total parts = 13. Milk = [8 / (8+5)] × 369 = 227 L.

This question belongs to: Maths Ratio and Proportion

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