Find the mean proportional between 10 and 48. MCQ with Answer and Explanation

Find the mean proportional between 10 and 48.

A. 58

B. 42

C. 24

D. 21

Answer: Option D

Mean proportional = √(10 × 48) = √(480) = 21.

This question belongs to: Maths Ratio and Proportion

No comments yet. Be the first to start the discussion!

Question #1 Report Error

Two numbers are in ratio 9:12. Their difference is 74. What is their sum?

A. 270

B. 210

C. 355

D. 105

Correct Answer: Option B

Explanation:
Numbers 9k, 12k. Difference |9-12|k = 74 ⇒ k = 24. Sum = (9+12)k ≈ 210.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 11:9 and their sum is 682. Find the numbers.

A. 399 and 285

B. 374 and 306

C. 748 and 612

D. 367 and 312

Correct Answer: Option B

Explanation:
Numbers = 11k and 9k. 11k + 9k = 682 ⇒ k = 34. Thus, numbers are 374 and 306.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

If a:b = 5:3 and b:c = 3:7, then a:b:c = ?

A. 4:3:8

B. 5:3:7

C. 10:6:14

D. 5:4:7

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 5:3, b:c = 3:7 ⇒ a:b:c = 5:3:7.

This question belongs to: Maths Ratio and Proportion