If a:b = 3:6 and b:c = 6:4, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:6 and b:c = 6:4, then a:b:c = ?

A. 3:7:4

B. 3:6:4

C. 6:12:8

D. 2:6:5

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:6, b:c = 6:4 ⇒ a:b:c = 3:6:4.

This question belongs to: Maths Ratio and Proportion

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Question #1

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Two numbers are in the ratio 12:7 and their sum is 291. Find the numbers.

A. 180 and 105

B. 160 and 120

C. 360 and 210

D. 202 and 77

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Correct Answer: Option A

Explanation:
Numbers = 12k and 7k. 12k + 7k = 291 ⇒ k = 15. Thus, numbers are 180 and 105.

This question belongs to: Maths Ratio and Proportion

Question #2

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

A. 10:8:10

B. 4:4:6

C. 5:5:5

D. 5:4:5

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #3

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Two numbers are in the ratio 13:5 and their sum is 464. Find the numbers.

A. 650 and 250

B. 314 and 136

C. 325 and 125

D. 341 and 114

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Correct Answer: Option C

Explanation:
Numbers = 13k and 5k. 13k + 5k = 464 ⇒ k = 25. Thus, numbers are 325 and 125.

This question belongs to: Maths Ratio and Proportion

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