Sphere and hemisphere have same volume. Radius of sphere =7cm
Rs = sphere radius; Rh = hemisphere radius
Hemisphere volume = Sphere volume
(pi/12)(Rh)^3 = (pi/6)Rs^3
(Rh/Rs)^3 = 2
Rh/Rs = cube root of 2 = 1.260
Rs = 5.556 cm
Hemisphere volume = Sphere volume
(pi/12)(Rh)^3 = (pi/6)Rs^3
(Rh/Rs)^3 = 2
Rh/Rs = cube root of 2 = 1.260
Rs = 5.556 cm