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. 4:4:7

C. 5:4:6

D. 10:8:12

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 the ratio 7:8 and their sum is 572. Find the numbers.

A. 246 and 324

B. 532 and 608

C. 296 and 283

D. 266 and 304

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Correct Answer: Option D

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

Question #2

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Two numbers are in ratio 11:9. Their difference is 111. What is their sum?

A. 240

B. 480

C. 560

D. 526

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Correct Answer: Option B

Explanation:
Numbers 11k, 9k. Difference |11-9|k = 111 ⇒ k = 55. Sum = (11+9)k ≈ 480.

This question belongs to: Maths Ratio and Proportion

Question #3

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If a:b = 5:10 and b:c = 10:6, then a:b:c = ?

A. 5:10:6

B. 10:20:12

C. 5:11:6

D. 4:10:7

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 5:10, b:c = 10:6 ⇒ a:b:c = 5:10:6.

This question belongs to: Maths Ratio and Proportion

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