1. The problem statement, all variables and given/known data A tank for scuba diving is designed to contain 50 standard cubic feet of air when filled to a pressure of 3,000 pounds per square inch (gage) at an ambient temperature of 80 F. Calculate the interior volume of the tank. A standard cubic foot occupies one cubic foot at T=15 C and 101.3 kPa. 2. Relevant equations PV=nRT 3. The attempt at a solution I used PV/RT = PV/RT . I made sure all the units were correct but the volume I get is way too large.