If a:b = 7:5 and b:c = 5:8, then a:b:c = ? MCQ with Answer and Explanation

Question Report Error

If a:b = 7:5 and b:c = 5:8, then a:b:c = ?

A. 7:5:8

B. 7:6:8

C. 6:5:9

D. 14:10:16

Answer: Option A

Solution (By JKExamLibrary)

Combine ratios: a:b = 7:5, b:c = 5:8 ⇒ a:b:c = 7:5:8.

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 = 2:9 and b:c = 9:7, then a:b:c = ?

A. 1:9:8

B. 2:10:7

C. 2:9:7

D. 4:18:14

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 2:9, b:c = 9:7 ⇒ a:b:c = 2:9:7.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in the ratio 11:13 and their sum is 148. Find the numbers.

A. 132 and 156

B. 66 and 78

C. 96 and 67

D. 50 and 90

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Numbers = 11k and 13k. 11k + 13k = 148 ⇒ k = 6. Thus, numbers are 66 and 78.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Find the mean proportional between 7 and 35.

A. 18

B. 42

C. 15

D. 30

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Mean proportional = √(7 × 35) = √(245) = 15.

This question belongs to: Maths Ratio and Proportion

Explore All Ratio and Proportion MCQs