If a:b = 2:4 and b:c = 4:10, then a:b:c = ? MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Ratio and Proportion Questions
Question #1
Report Error
If a:b = 2:3 and b:c = 3:9, then a:b:c = ?
Correct Answer: Option A
Explanation:
Combine ratios: a:b = 2:3, b:c = 3:9 ⇒ a:b:c = 2:3:9.
Combine ratios: a:b = 2:3, b:c = 3:9 ⇒ a:b:c = 2:3:9.
This question belongs to:
Maths
Ratio and Proportion
Question #2
Report Error
Ratio of present ages of A and B is 7:8. After 4 years, the ratio becomes 10:11. Present age of A is?
Correct Answer: Option C
Explanation:
Let ages 7k and 8k. Then (7k + 4)/(8k + 4) = 10/11. Solving gives k ≈ 19, age of A = 7*19 = 133.
Let ages 7k and 8k. Then (7k + 4)/(8k + 4) = 10/11. Solving gives k ≈ 19, age of A = 7*19 = 133.
This question belongs to:
Maths
Ratio and Proportion
Question #3
Report Error
If a:b = 3:5 and b:c = 5:9, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 3:5, b:c = 5:9 ⇒ a:b:c = 3:5:9.
Combine ratios: a:b = 3:5, b:c = 5:9 ⇒ a:b:c = 3:5:9.
This question belongs to:
Maths
Ratio and Proportion
No comments yet. Be the first to start the discussion!