A can do a work in 20 days. B is 25% more efficient than A. How long will B take to do the work?
Q1. A can do a work in 20 days. B is 25% more efficient than A. How long will B take to do the work?
Answer: 16 days
Explanation: B is 25% more efficient, so B's rate = 1/20 * 1.25 = 1/16. Hence, B will take 16 days.