A tank can be filled by two pipes in 2 hours and 3 hours, respectively. How long will it take to fill the tank if both pipes are used together?
Q1. A tank can be filled by two pipes in 2 hours and 3 hours, respectively. How long will it take to fill the tank if both pipes are used together?
Answer: 1.2 hours
Explanation: Rate of first pipe = 1/2, rate of second pipe = 1/3. Combined rate = 1/2 + 1/3 = 5/6. Time = 1 / (5/6) = 6/5 = 1.2 hours.