Q. A is twice as efficient as B. If they work together, they take 18 days. How long will B alone take?
✅ Correct Answer: (C)
54 days
Explanation: A = 2x, B = x. Together = 3x = 1/18 → x = 1/54. So B takes 54 days.
Explanation by: Kartik Sharma
A = 2x, B = x. Together = 3x = 1/18 → x = 1/54. So B takes 54 days.