[填空题]
A container has the s rycut2fo f3e4b5zrc4*r 28ug hape of a right b jk3i.5,f zzot(e *7hz*rau ncircular cylinder, as shown in the left diagram below. The height of the container iz5ohf3uj , k .azzbt7n( eir**s 5 cm, and the diameter of the cylinder's base is 8 cm.
1.Find the volume of the container, V. $cm^3$
A cup full of water has the shape of hemisphere, as shown in the right diagram above. The water from the cup is poured into the container and fills one third of the container.
2.Find the radius of the cup, r. cm