If a:b = 8:10 and b:c = 10:12, then a:b:c = ? MCQ with Answer and Explanation

Question

Share Report Error

If a:b = 8:10 and b:c = 10:12, then a:b:c = ?

A. 16:20:24

B. 8:10:12

C. 7:10:13

D. 8:11:12

Answer: Option B

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 8:10, b:c = 10:12 ⇒ a:b:c = 8:10:12.

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 19 and 78.

A. 38

B. 97

C. 76

D. 41

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Mean proportional = √(19 × 78) = √(1482) = 38.

This question belongs to: Maths Ratio and Proportion

Question #2

Ratio of present ages of A and B is 4:8. After 6 years, the ratio becomes 5:10. Present age of A is?

A. 52 years

B. 112 years

C. 61 years

D. 56 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Let ages 4k and 8k. Then (4k + 6)/(8k + 6) = 5/10. Solving gives k ≈ 14, age of A = 4*14 = 56.

This question belongs to: Maths Ratio and Proportion

Question #3

Two numbers are in ratio 10:6. Their difference is 122. What is their sum?

A. 630

B. 544

C. 582

D. 272

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Numbers 10k, 6k. Difference |10-6|k = 122 ⇒ k = 30. Sum = (10+6)k ≈ 544.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs