Odpowiedzi

2010-03-18T08:38:47+01:00
V=1/3 * Pp* h
h= 4 cm
l=5 cm
^2 - do potegi drugiej

l^2= h^2 + r^2
r^2 = l^2 -h^2
r^2 = 5^2 -4^2
r^2 = 25 -16
r^2 = 9
r=3 cm

TT -pi
Pp = TT* r^2
Pp= TT * 3^2
Pp= 9 TT cm^2

V= 1/3 * 9 TT * 4
V= 12 TT cm^3
2010-03-18T08:39:29+01:00
L=5cm
H=4cm
r=?

r2+H2=l2
r2+16=25
r2=9
r=3
v=1/3πr2H
v=1/3π9x4
v=12πcm3

2010-03-18T08:40:58+01:00
V= ⅓ πr² * H
4² * x² = 5²
x²=25-16
x²=9
x=√ 9
x=3

V=⅓ π 3² * 4 = ⅓ π 36= 12π