A can do a work in 20 days. B is 25% more efficient than A. How many days will B take?
Q1. A can do a work in 20 days. B is 25% more efficient than A. How many days will B take?
Answer: 16 days
Explanation: If B is 25% more efficient, B's work rate = 1.25 * A's rate. So, B will take 20 / 1.25 = 16 days.