I am trying to find the hydrostatic force of a cylindrical tank of water. I was hoping someone could help point me in the right direction.

I have a cylindrical water tank. The dimensions are as follows:-

I need to find the magnitude of the hydro static force per unit of circumference.

I know the answer which is 354000 i just dont know how to get to it.

I currently do the following:-

Force = Density * Gravity * Distance from Surface to centriod of tank * Area

Density = 1000

Gravity = 9.8

Distance from surface to centriod of tank = 4.25

Area = 28.274

Force = 1000 * 9.8 * 4.25 * 28.274 = 1177612 Newtons

Circumference = 2 * Pie * Radius = 18.8496

I dont really know where to from here?

I thought i could just divide the Force by the Circumference but i have been told that this is incorrect.

Its the "per unit of circumference" that's really throwing me.

Can anyone help?

Thank you.