面積和體積(三)

As Total surface area of semisphere=4(pi)r^2/2+(pi)r^2



Let r be the radius of semisphere
4(pi)r^2/2+(pi)r^2=100
r=3.257350079 cm

The volume of semisphere is:
4/3(pi) /2 r^3=72.38555732 cm^3