Mr. macady has an old cylindrical grain silo on his farm that stands 25 feet high with a diameter of 10 feet. mr. macady is planning to tear down the old silo and replace it with a new and bigger one. the new cylindrical silo will stand 30 feet high and have a diameter of 15 feet. a. what is the volume of the old silo b. what is the volume of the new silo c. how much greater is the volume of the new silo than the old silo