If a:b = 5:8 and b:c = 8:7, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 5:8 and b:c = 8:7, then a:b:c = ?

A. 4:8:8

B. 10:16:14

C. 5:9:7

D. 5:8:7

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 5:8, b:c = 8:7 ⇒ a:b:c = 5:8:7.

This question belongs to: Maths Ratio and Proportion

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Question #1

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

A. 7:8:6

B. 16:16:10

C. 8:9:5

D. 8:8:5

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Correct Answer: Option D

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

This question belongs to: Maths Ratio and Proportion

Question #2

If a:b = 5:7 and b:c = 7:7, then a:b:c = ?

A. 5:7:7

B. 5:8:7

C. 4:7:8

D. 10:14:14

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 5:7, b:c = 7:7 ⇒ a:b:c = 5:7:7.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in the ratio 11:15 and their sum is 450. Find the numbers.

A. 374 and 510

B. 214 and 229

C. 187 and 255

D. 181 and 267

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Correct Answer: Option C

Explanation:
Numbers = 11k and 15k. 11k + 15k = 450 ⇒ k = 17. Thus, numbers are 187 and 255.

This question belongs to: Maths Ratio and Proportion

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