Find the mean proportional between 7 and 28. MCQ with Answer and Explanation

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Find the mean proportional between 7 and 28.

A. 35

B. 28

C. 17

D. 14

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(7 × 28) = √(196) = 14.

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. 4:5:12

B. 8:10:24

C. 3:5:13

D. 4:6:12

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Correct Answer: Option A

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 8:5. Their difference is 125. What is their sum?

A. 403

B. 201

C. 519

D. 445

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Correct Answer: Option A

Explanation:
Numbers 8k, 5k. Difference |8-5|k = 125 ⇒ k = 41. Sum = (8+5)k ≈ 403.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 3:6 and b:c = 6:12, then a:b:c = ?

A. 3:6:12

B. 2:6:13

C. 3:7:12

D. 6:12:24

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 3:6, b:c = 6:12 ⇒ a:b:c = 3:6:12.

This question belongs to: Maths Ratio and Proportion

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