im back again with another problem. The maximum gauge pressure in a hydraulic lift is 19.3 atm. What is the largest size vehicle ( kg) it can lift if the diameter of the output line is 23.8 cm? What I did was convert 19.3 atm to 1.96e6 N/m^2, then I got density by using the formual P= rho x g x h, my result was a density of 8.40e5 kg/m^3. My goal was to determine the volume and then get mass using m= rho x V. Is this the right way to go about this problem?