The leak in Jerry's roof drips 3 drops a minute into the pot he put under it. Each drop is 20 ml, and the pot holds 3 liters. How long will it take the pot to be full? Think carefully first, then make a decision:
First find the pot's volume in ml: 3 liters * 1000 ml / liter = 3000 ml. Then find the number of ml that enter the pot per minute: 3 drops / minute * 20 ml / drop = 60 ml / minute. Then divide the volume of the pot by the volume that enters it every minute: 3000 ml / 60 ml / minute = 50 minutes. So, the answer is 50.