Previous Thread https://www.physicsforums.com/showthread.php?t=55809 Problem, again.. The bottom of a steel "boat" is a 7.00 m\times 9.00 m\times 5.00 cm piece of steel (Psteel=7900). The sides are made of 0.540 cm-thick steel. What minimum height must the sides have for this boat to float in perfectly calm water? Question- How the heck did the person in previous post get that big long equation? My books says the hmin=Mass/Pf*A. Im having trouble differing the Mass. I tried to find it from the equation Pavg=M/AH. 7900=x/5*10*.02... Appreciate your help, this chapter is killing me.