Find the mean proportional between 16 and 72. MCQ with Answer and Explanation

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Find the mean proportional between 16 and 72.

A. 66

B. 33

C. 36

D. 88

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(16 × 72) = √(1152) = 33.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 4:5 and b:c = 5:12, then a:b:c = ?

A. 8:10:24

B. 4:6:12

C. 4:5:12

D. 3:5:13

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:12 ⇒ a:b:c = 4:5:12.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in ratio 11:7. Their difference is 58. What is their sum?

A. 280

B. 126

C. 350

D. 252

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Correct Answer: Option D

Explanation:
Numbers 11k, 7k. Difference |11-7|k = 58 ⇒ k = 14. Sum = (11+7)k ≈ 252.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:6 and b:c = 6:9, then a:b:c = ?

A. 3:6:9

B. 3:7:9

C. 6:12:18

D. 2:6:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:9 ⇒ a:b:c = 3:6:9.

This question belongs to: Maths Ratio and Proportion

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