1. water flows from a container at the rate of 2.5 litres per minute. The water flows into a tank that already holds 50 litres. How long in seconds is it before there are 765 litres of water to be in the tank?
2. a cylindrical tank currently holds 0.4 cubic feet of oxygen. if the rate to fill a cylindrical tank is 2 cubic feet per minute, how long would it take to fill the cylinder?