Awok frying pan is shaped like a spherical bowl with handles. a bit of experimentation at home persuades a cook that a wok holds about 3 l if it is 9 cm deep and the sphere has a radius of 20 cm. to be sure, picture the wok as a solid of revolution, as shown in the figure, and calculate its volume with an integral. what is the real volume of the wok? (1l=1000cm^3)