V o l u m = 1 3 ⋅ π ⋅ h ⋅ ( R 2 + r 2 + R ⋅ r )
s = h 2 + ( R − r ) 2
R: large radius r: small radius
L a t e r a l S u r f a c e = π ⋅ ( R + r ) ⋅ s Or L a t e r a l S u r f a c = π ⋅ ( R + r ) ⋅ h 2 + ( R − r ) 2
Total surface area = lateral surface area + top + base
