You Are Given the Shape of the Vertical Ends of a Trough

Multiple Choice

You are given the shape of the vertical ends of a trough that is completely filled with water. Find the force exerted by the water on one end of the trough. (The weight density of water is $62.4 \mathrm { lb } / \mathrm { ft } ^ { 3 }$ .)

A) $780 \mathrm { lb }$
B) $312 \mathrm { lb }$
C) $156 \mathrm { lb }$
D) $1,560 \mathrm { lb }$