Find the mean proportional between 16 and 39. MCQ with Answer and Explanation

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Find the mean proportional between 16 and 39.

A. 27

B. 55

C. 48

D. 24

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(16 × 39) = √(624) = 24.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:7 and b:c = 7:6, then a:b:c = ?

A. 7:7:7

B. 8:7:6

C. 8:8:6

D. 16:14:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:7, b:c = 7:6 ⇒ a:b:c = 8:7:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 9:6 in a 275 L mixture. Quantity of milk?

A. 165 L

B. 330 L

C. 110 L

D. 186 L

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Correct Answer: Option A

Explanation:
Total parts = 15. Milk = [9 / (9+6)] × 275 = 165 L.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:6 and b:c = 6:11, then a:b:c = ?

A. 4:7:11

B. 4:6:11

C. 8:12:22

D. 3:6:12

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:11 ⇒ a:b:c = 4:6:11.

This question belongs to: Maths Ratio and Proportion

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