If a:b = 7:8 and b:c = 8:9, then a:b:c = ? MCQ with Answer and Explanation

Question Report Error

If a:b = 7:8 and b:c = 8:9, then a:b:c = ?

A. 14:16:18

B. 7:8:9

C. 6:8:10

D. 7:9:9

Answer: Option B

Solution (By JKExamLibrary)

Combine ratios: a:b = 7:8, b:c = 8:9 ⇒ a:b:c = 7:8:9.

This question belongs to: Maths Ratio and Proportion

Discuss this Question (0)

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

Practice More Ratio and Proportion Questions

Question #1 Report Error

If a:b = 6:7 and b:c = 7:10, then a:b:c = ?

A. 12:14:20

B. 5:7:11

C. 6:8:10

D. 6:7:10

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Combine ratios: a:b = 6:7, b:c = 7:10 ⇒ a:b:c = 6:7:10.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 7:15 and their sum is 454. Find the numbers.

A. 280 and 600

B. 126 and 320

C. 170 and 281

D. 140 and 300

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Numbers = 7k and 15k. 7k + 15k = 454 ⇒ k = 20. Thus, numbers are 140 and 300.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

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

A. 4:6:6

B. 4:7:6

C. 3:6:7

D. 8:12:12

View Answer & Solution Discuss

Correct Answer: Option A

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

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs