Find the mean proportional between 10 and 72. MCQ with Answer and Explanation

Question Report Error

Find the mean proportional between 10 and 72.

A. 52

B. 26

C. 82

D. 29

Answer: Option B

Solution (By JKExamLibrary)

Mean proportional = √(10 × 72) = √(720) = 26.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

If a:b = 3:5 and b:c = 5:5, then a:b:c = ?

A. 6:10:10

B. 3:5:5

C. 2:5:6

D. 3:6:5

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:5, b:c = 5:5 ⇒ a:b:c = 3:5:5.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 13:11 and their sum is 287. Find the numbers.

A. 286 and 242

B. 143 and 121

C. 138 and 127

D. 158 and 106

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Numbers = 13k and 11k. 13k + 11k = 287 ⇒ k = 11. Thus, numbers are 143 and 121.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 8:6 and their sum is 434. Find the numbers.

A. 496 and 372

B. 262 and 167

C. 248 and 186

D. 230 and 206

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Numbers = 8k and 6k. 8k + 6k = 434 ⇒ k = 31. Thus, numbers are 248 and 186.

This question belongs to: Maths Ratio and Proportion

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