If a:b = 7:8 and b:c = 8:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:8 and b:c = 8:7, then a:b:c = ?

A. 7:9:7

B. 6:8:8

C. 14:16:14

D. 7:8:7

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 7:8, b:c = 8:7 ⇒ a:b:c = 7:8:7.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1

Find the mean proportional between 11 and 61.

A. 28

B. 25

C. 72

D. 50

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Correct Answer: Option B

Explanation:
Mean proportional = √(11 × 61) = √(671) = 25.

This question belongs to: Maths Ratio and Proportion

Question #2

Milk and water are in ratio 5:7 in a 377 L mixture. Quantity of milk?

A. 157 L

B. 220 L

C. 314 L

D. 199 L

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Correct Answer: Option A

Explanation:
Total parts = 12. Milk = [5 / (5+7)] × 377 = 157 L.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 15:4 and their sum is 182. Find the numbers.

A. 118 and 54

B. 135 and 36

C. 270 and 72

D. 155 and 15

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Correct Answer: Option B

Explanation:
Numbers = 15k and 4k. 15k + 4k = 182 ⇒ k = 9. Thus, numbers are 135 and 36.

This question belongs to: Maths Ratio and Proportion

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