Objetosc V = Pp * H
Pp - pole podstawy
r - promien podstawy
r = 4cm
Pp = π r^2 = π 4^2 = 16 π
H - wysokosc walca
H = 7cm
V = 16 π * 7 = 112 π cm^3
Pole calkowite = 2*Pp + Pb
Pp = 16 π (obliczone powyzej)
Pb - pole boczne (po rozwinieciu ma ksztalt prostokata)
Pb = 2 π * r * H
Pb = 2 π * 4 * 7 = 56 π
Pc = 2 * 16 π + 56 π = 32 π + 56 π = 88 π cm^2
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(pi)4(kw)*7=
Objetosc V = Pp * H
Pp - pole podstawy
r - promien podstawy
r = 4cm
Pp = π r^2 = π 4^2 = 16 π
H - wysokosc walca
H = 7cm
V = 16 π * 7 = 112 π cm^3
Pole calkowite = 2*Pp + Pb
Pp = 16 π (obliczone powyzej)
Pb - pole boczne (po rozwinieciu ma ksztalt prostokata)
Pb = 2 π * r * H
Pb = 2 π * 4 * 7 = 56 π
Pc = 2 * 16 π + 56 π = 32 π + 56 π = 88 π cm^2