Question

Oblicz pole calkowite i objetosc stozka wiedzac ze h-4 r-3

Answer 1

V=⅓πr²H
V=⅓π×(3)²x4
V=⅓π×9×4
V=⅓π×36
V=12π

Pc=πr²+πrl
l²=H²+r²
l²=3²+4²
l²=9+16
l²=25 /√
l=5

Pc=πx(3)²+πx3x5
Pc=9π+15π
Pc=24π

Answer 2

Pc=π*r*(r+l)
V=1/3*π*r2*h
L-tworząca stożka
L2=h2+r2
L2=16+9
L2=25
L=5
Pc=π*3*(3+5)
Pc=π*3*8
Pc=24π [j2]
V=1/3*π*9*4
V=12π [j3]