S=4πR^2
V=4/3 πR^3
1. R=4 s=4π*4^2=64π v=4/3 π*4^3=π256/3
2. R=1/2 s=4π*(1/2)^2=π v=4/3 π*(1/2)^3=π/12
S=4πR^2
V=4/3 πR^3
1. R=4 s=4π*4^2=64π v=4/3 π*4^3=π256/3
2. R=1/2 s=4π*(1/2)^2=π v=4/3 π*(1/2)^3=π/12