If a:b = 6:9 and b:c = 9:4, then a:b:c = ? MCQ with Answer and Explanation

Question

Share Report Error

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

A. 6:9:4

B. 12:18:8

C. 5:9:5

D. 6:10:4

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Ratio and Proportion

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Ratio and Proportion Questions

Question #1

If a:b = 5:6 and b:c = 6:9, then a:b:c = ?

A. 4:6:10

B. 10:12:18

C. 5:7:9

D. 5:6:9

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 5:6, b:c = 6:9 ⇒ a:b:c = 5:6:9.

This question belongs to: Maths Ratio and Proportion

Question #2

Find the mean proportional between 32 and 50.

A. 43

B. 82

C. 80

D. 40

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Mean proportional = √(32 × 50) = √(1600) = 40.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 5:8. After 12 years, the ratio becomes 6:11. Present age of A is?

A. 110 years

B. 50 years

C. 60 years

D. 55 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Let ages 5k and 8k. Then (5k + 12)/(8k + 12) = 6/11. Solving gives k ≈ 11, age of A = 5*11 = 55.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs