Find the mean proportional between 11 and 38. MCQ with Answer and Explanation

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Find the mean proportional between 11 and 38.

A. 23

B. 20

C. 49

D. 40

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(11 × 38) = √(418) = 20.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:6 and b:c = 6:12, then a:b:c = ?

A. 8:6:12

B. 8:7:12

C. 7:6:13

D. 16:12:24

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 8:6, b:c = 6:12 ⇒ a:b:c = 8:6:12.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:4 and b:c = 4:6, then a:b:c = ?

A. 12:8:12

B. 6:5:6

C. 5:4:7

D. 6:4:6

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 6:4, b:c = 4:6 ⇒ a:b:c = 6:4:6.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 5:9. Their difference is 44. What is their sum?

A. 505

B. 476

C. 619

D. 238

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Correct Answer: Option B

Explanation:
Numbers 5k, 9k. Difference |5-9|k = 44 ⇒ k = 11. Sum = (5+9)k ≈ 476.

This question belongs to: Maths Ratio and Proportion

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