Chapter 12 review 12­4 ­12­6 and 12­8 Find the volume of each prism, cylinder, pyramid, sphere, hemisphere, or cone. Round to the nearest tenth if necessary. 1 2 4 5 3 6 7. Find the volume of the sphere if the circumference is 36 yds. 8. If the volume of a sphere is 72. Find the radius. 9. Two similar pyramids have heights of 4 inches and 7 inches What is the ratio of the volume of the small pyramid to the volume of the large pyramid? 10 . A farmer has two similar cylindrical grain silos. The smaller silo is 25 feet tall and the larger silo is 40 feet tall. If the smaller silo can hold 1500 cubic feet of grain, how much can the larger silo hold?