howe to get inner curved surface of frustuum????

sharman....thats easy .i have P2..........but how to get force???????

wat force ????????

see if i have any frustum and iits wvertical filled with a liquid(p den.) ..........

--> divide into smaller circles ...

-->the radius is a fumction of the height

-->now usually they give radii at ends and height

-->take axis of symmitry as x axis .....

-->now the y height will be radius u have 2 points u can find the line or R AS f(h)

-->now P is function of h also put in that vanue and multiply with 2 pi R dR ........

hope it helps