Find the mean proportional between 17 and 42. MCQ with Answer and Explanation

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Find the mean proportional between 17 and 42.

A. 26

B. 29

C. 52

D. 59

Answer: Option A

Solution (By JKSSB Mock Tests)

Mean proportional = √(17 × 42) = √(714) = 26.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 7:4 and b:c = 4:8, then a:b:c = ?

A. 6:4:9

B. 7:5:8

C. 14:8:16

D. 7:4:8

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 7:4, b:c = 4:8 ⇒ a:b:c = 7:4:8.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 4:5 and b:c = 5:9, then a:b:c = ?

A. 4:6:9

B. 4:5:9

C. 3:5:10

D. 8:10:18

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:9 ⇒ a:b:c = 4:5:9.

This question belongs to: Maths Ratio and Proportion

Question #3

Milk and water are in ratio 6:4 in a 289 L mixture. Quantity of milk?

A. 173 L

B. 346 L

C. 223 L

D. 116 L

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Correct Answer: Option A

Explanation:
Total parts = 10. Milk = [6 / (6+4)] × 289 = 173 L.

This question belongs to: Maths Ratio and Proportion

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