If a:b = 4:5 and b:c = 5:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 4:5 and b:c = 5:11, then a:b:c = ?

A. 8:10:22

B. 4:6:11

C. 3:5:12

D. 4:5:11

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:5, b:c = 5:11 ⇒ a:b:c = 4:5:11.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 11:13 and their sum is 148. Find the numbers.

A. 66 and 78

B. 50 and 90

C. 96 and 67

D. 132 and 156

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Correct Answer: Option A

Explanation:
Numbers = 11k and 13k. 11k + 13k = 148 ⇒ k = 6. Thus, numbers are 66 and 78.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 6:9 and b:c = 9:6, then a:b:c = ?

A. 6:10:6

B. 5:9:7

C. 6:9:6

D. 12:18:12

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Correct Answer: Option C

Explanation:
Combine ratios: a:b = 6:9, b:c = 9:6 ⇒ a:b:c = 6:9:6.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 6:2 in a 401 L mixture. Quantity of milk?

A. 600 L

B. 345 L

C. 101 L

D. 300 L

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Correct Answer: Option D

Explanation:
Total parts = 8. Milk = [6 / (6+2)] × 401 = 300 L.

This question belongs to: Maths Ratio and Proportion

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