If a:b = 4:7 and b:c = 7:4, then a:b:c = ? MCQ with Answer and Explanation

Question

Share Report Error

If a:b = 4:7 and b:c = 7:4, then a:b:c = ?

A. 4:7:4

B. 3:7:5

C. 4:8:4

D. 8:14:8

Answer: Option A

Solution (By JKSSB Mock Tests)

Combine ratios: a:b = 4:7, b:c = 7:4 ⇒ a:b:c = 4:7:4.

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

Share Report

Ratio of present ages of A and B is 4:7. After 11 years, the ratio becomes 5:8. Present age of A is?

A. 36 years

B. 45 years

C. 40 years

D. 80 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Let ages 4k and 7k. Then (4k + 11)/(7k + 11) = 5/8. Solving gives k ≈ 10, age of A = 4*10 = 40.

This question belongs to: Maths Ratio and Proportion

Question #2

Share Report

Two numbers are in the ratio 7:8 and their sum is 572. Find the numbers.

A. 296 and 283

B. 266 and 304

C. 246 and 324

D. 532 and 608

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
Numbers = 7k and 8k. 7k + 8k = 572 ⇒ k = 38. Thus, numbers are 266 and 304.

This question belongs to: Maths Ratio and Proportion

Question #3

Share Report

Ratio of present ages of A and B is 7:5. After 9 years, the ratio becomes 9:6. Present age of A is?

A. 117 years

B. 109 years

C. 112 years

D. 224 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Let ages 7k and 5k. Then (7k + 9)/(5k + 9) = 9/6. Solving gives k ≈ 16, age of A = 7*16 = 112.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs