Problem: The fuselage (body) of a 747 jumbo jet is roughly a cylinder 60m long and 6m in diameter. if the interior of the plane is pressurized to .75 atm, what is the net pressure force tending to separate half the cylinder from the other half when the plane is flying at 10 km, where air pressure is about 0.25 atm? Possible solution: I understand that forces exist here because a difference in pressure is present. Namely, since the interior of the plane is at 3 times the pressure of that outside the plane, the forces will be directed outward. Any advice on setting this up?