If a:b = 4:8 and b:c = 8:7, 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 = 4:6 and b:c = 6:9, then a:b:c = ?
Correct Answer: Option C
Explanation:
Combine ratios: a:b = 4:6, b:c = 6:9 ⇒ a:b:c = 4:6:9.
Combine ratios: a:b = 4:6, b:c = 6:9 ⇒ a:b:c = 4:6:9.
This question belongs to:
Maths
Ratio and Proportion
Question #2
Report Error
Ratio of present ages of A and B is 7:6. After 11 years, the ratio becomes 9:9. Present age of A is?
Correct Answer: Option B
Explanation:
Let ages 7k and 6k. Then (7k + 11)/(6k + 11) = 9/9. Solving gives k ≈ 14, age of A = 7*14 = 98.
Let ages 7k and 6k. Then (7k + 11)/(6k + 11) = 9/9. Solving gives k ≈ 14, age of A = 7*14 = 98.
This question belongs to:
Maths
Ratio and Proportion
Question #3
Report Error
Ratio of present ages of A and B is 7:8. After 8 years, the ratio becomes 9:9. Present age of A is?
Correct Answer: Option C
Explanation:
Let ages 7k and 8k. Then (7k + 8)/(8k + 8) = 9/9. Solving gives k ≈ 20, age of A = 7*20 = 140.
Let ages 7k and 8k. Then (7k + 8)/(8k + 8) = 9/9. Solving gives k ≈ 20, age of A = 7*20 = 140.
This question belongs to:
Maths
Ratio and Proportion
No comments yet. Be the first to start the discussion!