How to Calculate the Work to Pump Water from a Cone?

[player1_1_1]

Homework Statement

the task is to pump out the river from a cone with R radius and H height. How much will be the work (energy) used to do this? its a problem because I can't use here standard work definition W=\int F(s)\mbox{d}s, and I don't know what to do and how to start. please help:)

 

[player1_1_1]

up,,

 

[nickjer]

You aren't going to receive any responses on this. Your question makes no sense at all. In the future you will need to elaborate the question more since the readers don't have the book in front of them.