find volume of smal and big cone
big-small=frustum
V=1/3(hpir^2)
30=diameter of bic cone
d/2=r
15=radius of big cone
wat is radius of smal cone?
height:radius=height:raidus
40:15=20:x
x=7.5
small radius=7.5
now we have
small volume=
(1/3)20pi7.5^2=
(1/3)20pi57.25=
(1/3)1145pi=
381.66666666pi
big volume=
(1/3)40pi15^2=
(1/3)40pi225
(1/3)9000pi
3000pi
minus
big-small=
3000pi-381.6666666pi=
2618.3333333333pi
aprox pi=3.141592
8225.33333333333
8225.33 cm^3
