John has been researching grain silos he found it amazing that a farmer can fill a silo with enough grain to feed his animals through the winter he saw the silos and wondered how much grain make would hold each is shaped like a cylinder and each has Aiden diameter of 8 ft and they are 25 ft tall how much grain will they hold all together find the volume of 1 silo what would you need to find the volume of all three silos