If a:b = 2:6 and b:c = 6:12, then a:b:c = ? MCQ with Answer and Explanation

Question

Share Report Error

If a:b = 2:6 and b:c = 6:12, then a:b:c = ?

A. 2:7:12

B. 4:12:24

C. 1:6:13

D. 2:6:12

Answer: Option D

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 2:6, b:c = 6:12 ⇒ a:b:c = 2:6:12.

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

Find the mean proportional between 28 and 14.

A. 19

B. 42

C. 22

D. 38

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Mean proportional = √(28 × 14) = √(392) = 19.

This question belongs to: Maths Ratio and Proportion

Question #2

Two numbers are in the ratio 5:10 and their sum is 527. Find the numbers.

A. 189 and 327

B. 175 and 350

C. 350 and 700

D. 160 and 361

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Numbers = 5k and 10k. 5k + 10k = 527 ⇒ k = 35. Thus, numbers are 175 and 350.

This question belongs to: Maths Ratio and Proportion

Question #3

Ratio of present ages of A and B is 4:6. After 10 years, the ratio becomes 7:8. Present age of A is?

A. 32 years

B. 37 years

C. 26 years

D. 64 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Let ages 4k and 6k. Then (4k + 10)/(6k + 10) = 7/8. Solving gives k ≈ 8, age of A = 4*8 = 32.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs