Find the mean proportional between 19 and 14. MCQ with Answer and Explanation

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Find the mean proportional between 19 and 14.

A. 19

B. 33

C. 32

D. 16

Answer: Option D

Solution (By JKSSB Mock Tests)

Mean proportional = √(19 × 14) = √(266) = 16.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 5:5 and b:c = 5:9, then a:b:c = ?

A. 4:5:10

B. 5:6:9

C. 10:10:18

D. 5:5:9

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Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:5, b:c = 5:9 ⇒ a:b:c = 5:5:9.

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 7:8. After 6 years, the ratio becomes 8:9. Present age of A is?

A. 110 years

B. 105 years

C. 97 years

D. 210 years

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Correct Answer: Option B

Explanation:
Let ages 7k and 8k. Then (7k + 6)/(8k + 6) = 8/9. Solving gives k ≈ 15, age of A = 7*15 = 105.

This question belongs to: Maths Ratio and Proportion

Question #3

If a:b = 4:9 and b:c = 9:10, then a:b:c = ?

A. 4:9:10

B. 3:9:11

C. 4:10:10

D. 8:18:20

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:10 ⇒ a:b:c = 4:9:10.

This question belongs to: Maths Ratio and Proportion

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