how much height does the hemisphere add to the cylinder? That should remove one of your variables up there.
I need to calculate the diameter of a cylinder . However the cylinder has a hemisphere as a lid and a flat bottom.
I am given the overall surface area which is 2M square
The overall height is 84cm. Thats it
I can formulate the cylinder diameter if it didn't have a hemisphere top using quadratics however i just cant see how to get this.
SA of hemisphere = 2 pi r square
Sa of base = 1 Pi r square
Cylinder height H= h - r
Cylinder area = 2 pi r H
any help please.....
it removes the radius from the height and thats my problem i dont know the radius. with out the hemispere its around 3.6 ...
.Total SA ( 2 M sq ) = 3 pi r sq + 2 pi r (.84m)-r ) solve for r ?
can i remove r from + 2 pi r ( .84 - r ) so that its just + 2 pi ( .84) by cancelling ?