If a:b = 5:4 and b:c = 4:6, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:4 and b:c = 4:6, then a:b:c = ?

A. 5:5:6

B. 10:8:12

C. 5:4:6

D. 4:4:7

Answer: Option C

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in ratio 7:12. Their difference is 121. What is their sum?

A. 218

B. 326

C. 95

D. 190

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Correct Answer: Option D

Explanation:
Numbers 7k, 12k. Difference |7-12|k = 121 ⇒ k = 24. Sum = (7+12)k ≈ 190.

This question belongs to: Maths Ratio and Proportion

Question #2

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If a:b = 8:5 and b:c = 5:9, then a:b:c = ?

A. 16:10:18

B. 8:5:9

C. 7:5:10

D. 8:6:9

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 8:5, b:c = 5:9 ⇒ a:b:c = 8:5:9.

This question belongs to: Maths Ratio and Proportion

Question #3

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Milk and water are in ratio 3:7 in a 391 L mixture. Quantity of milk?

A. 274 L

B. 234 L

C. 117 L

D. 153 L

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Correct Answer: Option C

Explanation:
Total parts = 10. Milk = [3 / (3+7)] × 391 = 117 L.

This question belongs to: Maths Ratio and Proportion

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