Calc 2 hydrostatic force problem

[synx]

Find the hydrostatic force on one side wall of the pool when it is full of water.

how do i go about solving this?

image is attached

 

[berkeman]

You need to integrate the pressure * area for all the little dA area bits along the side wall. So write an equation for the water pressure as a function of depth, and integrate that p(d) along the height and width of the side.