S₁/S₂=20/80=2/8=1/4
h₁/h₂=√(1/4)=1/2
V₁/V₂=(1/2)³=1/8
S=S₁+S₂=100π
S=4πR²
R=5
V=4/3πR³=4/3π125=500π/3
или
S₁=2πRh
h₁=2
h₂=8
V₁=π4(5-2/3)=4π*13/3=52π/3
V₂=π64(5-8/3)=64π*7/3=448π/3
S₁/S₂=20/80=2/8=1/4
h₁/h₂=√(1/4)=1/2
V₁/V₂=(1/2)³=1/8
S=S₁+S₂=100π
S=4πR²
R=5
V=4/3πR³=4/3π125=500π/3
или
S₁=2πRh
h₁=2
h₂=8
V₁=π4(5-2/3)=4π*13/3=52π/3
V₂=π64(5-8/3)=64π*7/3=448π/3