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

Find the mean proportional between 32 and 50.

A. 80

B. 40

C. 82

D. 43

Answer: Option B

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

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Milk and water are in ratio 6:6 in a 413 L mixture. Quantity of milk?

A. 206 L

B. 245 L

C. 412 L

D. 207 L

Correct Answer: Option A

Explanation:
Total parts = 12. Milk = [6 / (6+6)] × 413 = 206 L.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 3:7 and b:c = 7:11, then a:b:c = ?

A. 2:7:12

B. 3:8:11

C. 6:14:22

D. 3:7:11

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 3:7, b:c = 7:11 ⇒ a:b:c = 3:7:11.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 5:6 and b:c = 6:9, then a:b:c = ?

A. 4:6:10

B. 10:12:18

C. 5:7:9

D. 5:6:9

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:6, b:c = 6:9 ⇒ a:b:c = 5:6:9.

This question belongs to: Maths Ratio and Proportion