Find the mean proportional between 19 and 77. MCQ with Answer and Explanation

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Find the mean proportional between 19 and 77.

A. 38

B. 96

C. 76

D. 41

Answer: Option A

Solution (By JKSSB Mock Tests)

Mean proportional = √(19 × 77) = √(1463) = 38.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

If a:b = 2:7 and b:c = 7:9, then a:b:c = ?

A. 4:14:18

B. 2:7:9

C. 1:7:10

D. 2:8:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 2:7, b:c = 7:9 ⇒ a:b:c = 2:7:9.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 9:4 in a 207 L mixture. Quantity of milk?

A. 143 L

B. 286 L

C. 176 L

D. 64 L

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Correct Answer: Option A

Explanation:
Total parts = 13. Milk = [9 / (9+4)] × 207 = 143 L.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 3:5:5

B. 2:5:6

C. 3:6:5

D. 6:10:10

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Correct Answer: Option A

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

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