If a:b = 4:4 and b:c = 4:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:4 and b:c = 4:9, then a:b:c = ?

A. 3:4:10

B. 8:8:18

C. 4:4:9

D. 4:5:9

Answer: Option C

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:4, b:c = 4:9 ⇒ a:b:c = 4:4:9.

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. 116 L

B. 694 L

C. 347 L

D. 384 L

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Correct Answer: Option C

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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Find the mean proportional between 31 and 33.

A. 34

B. 64

C. 62

D. 31

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Correct Answer: Option D

Explanation:
Mean proportional = √(31 × 33) = √(1023) = 31.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 8:6 in a 373 L mixture. Quantity of milk?

A. 213 L

B. 160 L

C. 253 L

D. 426 L

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Correct Answer: Option A

Explanation:
Total parts = 14. Milk = [8 / (8+6)] × 373 = 213 L.

This question belongs to: Maths Ratio and Proportion

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