If a:b = 5:6 and b:c = 6:9, then a:b:c = ? MCQ with Answer and Explanation

Question

Share Report Error

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

A. 5:6:9

B. 10:12:18

C. 4:6:10

D. 5:7:9

Answer: Option A

Solution (By JKSSB Mock Tests)

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

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

Share Report

Two numbers are in ratio 7:5. Their difference is 102. What is their sum?

A. 504

B. 647

C. 546

D. 252

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Numbers 7k, 5k. Difference |7-5|k = 102 ⇒ k = 51. Sum = (7+5)k ≈ 504.

This question belongs to: Maths Ratio and Proportion

Question #2

Share Report

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

A. 50 years

B. 42 years

C. 90 years

D. 45 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Let ages 5k and 4k. Then (5k + 4)/(4k + 4) = 6/7. Solving gives k ≈ 9, age of A = 5*9 = 45.

This question belongs to: Maths Ratio and Proportion

Question #3

Share Report

If a:b = 2:4 and b:c = 4:8, then a:b:c = ?

A. 2:4:8

B. 2:5:8

C. 1:4:9

D. 4:8:16

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 2:4, b:c = 4:8 ⇒ a:b:c = 2:4:8.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs