Find the mean proportional between 10 and 48. MCQ with Answer and Explanation

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Find the mean proportional between 10 and 48.

A. 21

B. 58

C. 24

D. 42

Answer: Option A

Solution (By JKSSB Mock Tests)

Mean proportional = √(10 × 48) = √(480) = 21.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 7:2 in a 488 L mixture. Quantity of milk?

A. 758 L

B. 379 L

C. 399 L

D. 109 L

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Correct Answer: Option B

Explanation:
Total parts = 9. Milk = [7 / (7+2)] × 488 = 379 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Milk and water are in ratio 9:4 in a 416 L mixture. Quantity of milk?

A. 128 L

B. 288 L

C. 313 L

D. 576 L

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Correct Answer: Option B

Explanation:
Total parts = 13. Milk = [9 / (9+4)] × 416 = 288 L.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 4:9 and b:c = 9:10, then a:b:c = ?

A. 8:18:20

B. 3:9:11

C. 4:9:10

D. 4:10:10

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:10 ⇒ a:b:c = 4:9:10.

This question belongs to: Maths Ratio and Proportion

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