A homogeneous, 4-ft-wide, 8-ft-long rectangular gate weighing 800 lb is held in place by...

A homogeneous, 4-ft-wide, 8-ft-long rectangular gate weighing 800 lb is held in place by a horizontal flexible cable as shown in Fig. P2.43. Water acts against the gate, which is hinged at point A. Friction in the hinge is negligible. Determine the tension in the cable.