The volume of a frustum of a cone is found by:
V = pi/12 x h x (D^2 + d^2 + Dd)
Where h = height, D = major diameter, d = minor diameter
I have an upside down cone frustum (i.e. larger diameter at top) with known values for D, d and h.
The solid is half full of liquid (by volume). How do I find the height of the liquid?