Find the mean proportional between 14 and 77. MCQ with Answer and Explanation

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Find the mean proportional between 14 and 77.

A. 35

B. 32

C. 91

D. 64

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(14 × 77) = √(1078) = 32.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 8:10 and b:c = 10:6, then a:b:c = ?

A. 8:10:6

B. 7:10:7

C. 16:20:12

D. 8:11:6

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 8:10, b:c = 10:6 ⇒ a:b:c = 8:10:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 4:5 and their sum is 398. Find the numbers.

A. 157 and 225

B. 352 and 440

C. 190 and 207

D. 176 and 220

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Correct Answer: Option D

Explanation:
Numbers = 4k and 5k. 4k + 5k = 398 ⇒ k = 44. Thus, numbers are 176 and 220.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 8:7 and b:c = 7:12, then a:b:c = ?

A. 8:7:12

B. 8:8:12

C. 16:14:24

D. 7:7:13

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 8:7, b:c = 7:12 ⇒ a:b:c = 8:7:12.

This question belongs to: Maths Ratio and Proportion

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