Calculate the volume flow in the pipe when two open tanks are connected to each other by a pipe with a roughness of 0.30 mm and a pipe length of 300 m and a diameter of 0.1 m. The difference in surface elevations is 5 m and the pipe has one slide valve and one ball valve. In addition to that, the pipe has one 90 degree bend (R/d = 1). The connections to the tanks are sharp.