Odpowiedź:
1) r=8 cm
P= 4*π*r^2=4*π*8^2=256*π cm^2= 256*3,14 = 803,84 cm^2
V= (4/3)*π*r^3=(4/3)*π*8^3= 682.7*π cm^3
2) r=4,4 cm
P= 4*π*r^2=4*π*4,4^2=77,44*π cm^2
V= (4/3)*π*r^3=(4/3)*π*4,4^3=113,6*π cm^3
3) r=25 cm
P= 4*π*r^2=4*π*25^2=2500*π cm^2
V= (4/3)*π*r^3=(4/3)*π*25^3= 20833*π cm^3
4) r=6,5 dm
P= 4*π*r^2=4*π*6,5^2=169*π dm^2
V= (4/3)*π*r^3=(4/3)*π*6,5^3= 366,2*π dm^3
r=6,5 dm=65 cm
P= 4*π*r^2=4*π*65^2=16900*π cm^2
V= (4/3)*π*r^3=(4/3)*π*65^3= 366166,7*π cm^3
