Metalowy stożek o promieniu podstawy 4 cm i wysokości 9 cm przetopione w kulę. Oblicz promień kuli.
Dane :
stożek
r = 4 cm
H = 9 cm
V = 1/3 π r² H
V = 1/3 π * 4² * 9 = 3*16π = 48 π cm³
kula
V = 4/3π R³
48 π = 4/3π R³ /*3
144π = 4π R³ /:4π
R³ = 36
R = ³√36
V1=
V1= 4^{2}*12*3,14
V1 602,88m^{3}
Pp stożka= pi r2
Pp= 16*pi
Pp= 50,24m2
V stożka= 1/3*S*h
V stożka= 1/3 * 9 * 50,24
V stożka= 150,72m3
V= 150,72 + 602,88
V= 753,60 m3
V kuli = 4/3* pi*r3
r3=3*V/4*pi
r3=2260,8/12,56
r3=180
r=6
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Dane :
stożek
r = 4 cm
H = 9 cm
V = 1/3 π r² H
V = 1/3 π * 4² * 9 = 3*16π = 48 π cm³
kula
V = 4/3π R³
48 π = 4/3π R³ /*3
144π = 4π R³ /:4π
R³ = 36
R = ³√36
V1=
V1= 4^{2}*12*3,14
V1 602,88m^{3}
Pp stożka= pi r2
Pp= 16*pi
Pp= 50,24m2
V stożka= 1/3*S*h
V stożka= 1/3 * 9 * 50,24
V stożka= 150,72m3
V= 150,72 + 602,88
V= 753,60 m3
V kuli = 4/3* pi*r3
r3=3*V/4*pi
r3=2260,8/12,56
r3=180
r=6