If a:b = 3:4 and b:c = 4:11, then a:b:c = ? MCQ with Answer and Explanation

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If a:b = 3:4 and b:c = 4:11, then a:b:c = ?

A. 3:5:11

B. 2:4:12

C. 6:8:22

D. 3:4:11

Answer: Option D

Solution (By JKExamLibrary)

Combine ratios: a:b = 3:4, b:c = 4:11 ⇒ a:b:c = 3:4:11.

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 = 4:6 and b:c = 6:9, then a:b:c = ?

A. 4:6:9

B. 8:12:18

C. 4:7:9

D. 3:6:10

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Correct Answer: Option A

Explanation:
Combine ratios: a:b = 4:6, b:c = 6:9 ⇒ a:b:c = 4:6:9.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 5:8 and b:c = 8:6, then a:b:c = ?

A. 10:16:12

B. 5:9:6

C. 4:8:7

D. 5:8:6

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:8, b:c = 8:6 ⇒ a:b:c = 5:8:6.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Ratio of present ages of A and B is 4:5. After 4 years, the ratio becomes 6:7. Present age of A is?

A. 120 years

B. 60 years

C. 55 years

D. 65 years

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Let ages 4k and 5k. Then (4k + 4)/(5k + 4) = 6/7. Solving gives k ≈ 15, age of A = 4*15 = 60.

This question belongs to: Maths Ratio and Proportion

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