If a:b = 7:10 and b:c = 10:9, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 7:10 and b:c = 10:9, then a:b:c = ?

A. 14:20:18

B. 7:10:9

C. 7:11:9

D. 6:10:10

Answer: Option B

Solution (By JKExamLibrary)

Combine ratios: a:b = 7:10, b:c = 10:9 ⇒ a:b:c = 7:10:9.

This question belongs to: Maths Ratio and Proportion

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Practice More Ratio and Proportion Questions

Question #1 Report Error

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

A. 6:9:6

B. 12:16:12

C. 6:8:6

D. 5:8:7

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Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

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

A. 4:9:8

B. 3:8:9

C. 4:8:8

D. 8:16:16

View Answer & Solution Discuss

Correct Answer: Option C

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

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

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

A. 180 and 105

B. 202 and 77

C. 360 and 210

D. 160 and 120

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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

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