Find the mean proportional between 32 and 50. MCQ with Answer and Explanation

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Find the mean proportional between 32 and 50.

A. 80

B. 82

C. 43

D. 40

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(32 × 50) = √(1600) = 40.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 9:4 in a 207 L mixture. Quantity of milk?

A. 286 L

B. 64 L

C. 143 L

D. 176 L

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Correct Answer: Option C

Explanation:
Total parts = 13. Milk = [9 / (9+4)] × 207 = 143 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 9:11. Their difference is 54. What is their sum?

A. 130

B. 260

C. 383

D. 316

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Correct Answer: Option B

Explanation:
Numbers 9k, 11k. Difference |9-11|k = 54 ⇒ k = 27. Sum = (9+11)k ≈ 260.

This question belongs to: Maths Ratio and Proportion

Question #3

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Find the mean proportional between 24 and 31.

A. 55

B. 30

C. 27

D. 54

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Correct Answer: Option C

Explanation:
Mean proportional = √(24 × 31) = √(744) = 27.

This question belongs to: Maths Ratio and Proportion

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