If a:b = 3:10 and b:c = 10:8, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:10 and b:c = 10:8, then a:b:c = ?

A. 3:10:8

B. 6:20:16

C. 3:11:8

D. 2:10:9

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 3:10, b:c = 10:8 ⇒ a:b:c = 3:10:8.

This question belongs to: Maths Ratio and Proportion

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Question #1

If a:b = 3:8 and b:c = 8:4, then a:b:c = ?

A. 3:9:4

B. 3:8:4

C. 2:8:5

D. 6:16:8

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Correct Answer: Option B

Explanation:
Combine ratios: a:b = 3:8, b:c = 8:4 ⇒ a:b:c = 3:8:4.

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 6:8 and b:c = 8:8, then a:b:c = ?

A. 6:8:8

B. 12:16:16

C. 6:9:8

D. 5:8:9

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 6:8, b:c = 8:8 ⇒ a:b:c = 6:8:8.

This question belongs to: Maths Ratio and Proportion

Question #3

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

A. 325 and 125

B. 650 and 250

C. 314 and 136

D. 341 and 114

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Correct Answer: Option A

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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