... there's a cylinder with inner dia R and outer dia R+dR... it has holes all around penetrating the whole thickness of the shell... assume the rim to be hollow and radius of holes to be "r" ...
Now, as we knw, the volume of a normal cylindrical shell is (pi)(R+dr-R)^2.(h).. Now what i want to...
ITS NOT A HOMEWORK PROBLEM
PROBLEM::- THINK OF A CYLINDRICAL SHELL WITH NUMEROUS SPHERICAL HOLES ALL AROUND IT.
(FOR EG. http://sell.lulusoso.com/upload/20120317/Underground_Water_Pipe.jpg)
HOW TO FIND VOLUME & SURFACE AREA OF SUCH A CYLINDRICAL SHELL.
(A GENERALIZED CASE FOR N HOLES AROUND...