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

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

A. 5:6:8

B. 10:10:16

C. 5:5:8

D. 4:5:9

Answer: Option C

Solution (By JKExamLibrary)

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

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

Find the mean proportional between 18 and 55.

A. 62

B. 31

C. 73

D. 34

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Correct Answer: Option B

Explanation:
Mean proportional = √(18 × 55) = √(990) = 31.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 4:9 and b:c = 9:8, then a:b:c = ?

A. 8:18:16

B. 4:9:8

C. 3:9:9

D. 4:10:8

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Combine ratios: a:b = 4:9, b:c = 9:8 ⇒ a:b:c = 4:9:8.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 6:5 and their sum is 517. Find the numbers.

A. 282 and 235

B. 304 and 215

C. 564 and 470

D. 267 and 244

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Correct Answer: Option A

Explanation:
Numbers = 6k and 5k. 6k + 5k = 517 ⇒ k = 47. Thus, numbers are 282 and 235.

This question belongs to: Maths Ratio and Proportion

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