Find the mean proportional between 29 and 50. MCQ with Answer and Explanation

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Find the mean proportional between 29 and 50.

A. 38

B. 79

C. 76

D. 41

Answer: Option A

Solution (By JKSSB Mock Tests)

Mean proportional = √(29 × 50) = √(1450) = 38.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 12:6 and their sum is 224. Find the numbers.

A. 288 and 144

B. 156 and 45

C. 132 and 88

D. 144 and 72

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Correct Answer: Option D

Explanation:
Numbers = 12k and 6k. 12k + 6k = 224 ⇒ k = 12. Thus, numbers are 144 and 72.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in the ratio 7:15 and their sum is 454. Find the numbers.

A. 126 and 320

B. 140 and 300

C. 170 and 281

D. 280 and 600

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Correct Answer: Option B

Explanation:
Numbers = 7k and 15k. 7k + 15k = 454 ⇒ k = 20. Thus, numbers are 140 and 300.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 7:6 in a 528 L mixture. Quantity of milk?

A. 244 L

B. 284 L

C. 568 L

D. 334 L

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Correct Answer: Option B

Explanation:
Total parts = 13. Milk = [7 / (7+6)] × 528 = 284 L.

This question belongs to: Maths Ratio and Proportion

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