Odpowiedzi

2010-02-22T22:06:56+01:00
120/360 * 36 =
1/3 * 36 = 12pi

Pirl = 12 pi,
l = 6, r = 2

h = √l²-r²
h = √36-4 = √32 = 4√2

V = 1/3 pi r² h
V = 1/3 4 4√2
Pc = pi 2² + pi2*6 = 4 + 12 = 18 pi