Find the mean proportional between 33 and 15. MCQ with Answer and Explanation

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Find the mean proportional between 33 and 15.

A. 44

B. 22

C. 48

D. 25

Answer: Option B

Solution (By JKSSB Mock Tests)

Mean proportional = √(33 × 15) = √(495) = 22.

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 = 5:6, then a:b:c = ?

A. 8:10:12

B. 4:5:6

C. 4:6:6

D. 3:5:7

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:5, b:c = 5:6 ⇒ a:b:c = 4:5:6.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 7:15 and their sum is 349. Find the numbers.

A. 94 and 237

B. 210 and 450

C. 115 and 199

D. 105 and 225

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Correct Answer: Option D

Explanation:
Numbers = 7k and 15k. 7k + 15k = 349 ⇒ k = 15. Thus, numbers are 105 and 225.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 6:6. After 12 years, the ratio becomes 8:7. Present age of A is?

A. 144 years

B. 72 years

C. 64 years

D. 77 years

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Correct Answer: Option B

Explanation:
Let ages 6k and 6k. Then (6k + 12)/(6k + 12) = 8/7. Solving gives k ≈ 12, age of A = 6*12 = 72.

This question belongs to: Maths Ratio and Proportion

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