Find the mean proportional between 23 and 54. MCQ with Answer and Explanation

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Find the mean proportional between 23 and 54.

A. 70

B. 77

C. 38

D. 35

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(23 × 54) = √(1242) = 35.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Milk and water are in ratio 5:4 in a 536 L mixture. Quantity of milk?

A. 239 L

B. 329 L

C. 297 L

D. 594 L

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Correct Answer: Option C

Explanation:
Total parts = 9. Milk = [5 / (5+4)] × 536 = 297 L.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 8:3 and b:c = 3:4, then a:b:c = ?

A. 16:6:8

B. 7:3:5

C. 8:3:4

D. 8:4:4

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 8:3, b:c = 3:4 ⇒ a:b:c = 8:3:4.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 7:4 and b:c = 4:10, then a:b:c = ?

A. 6:4:11

B. 7:5:10

C. 14:8:20

D. 7:4:10

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 7:4, b:c = 4:10 ⇒ a:b:c = 7:4:10.

This question belongs to: Maths Ratio and Proportion

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