A farmer needs to paint his granary and will need to know how much paint to order. In addition, he also needs to know how much grain the structure will hold. The granary is a cylinder in shape with a diameter of 10 meters, and a height of 28 meters. Answer the following:


a. How many gallons of paint does he need to paint the exterior of the granary if one gallon of paint covers 35m2??
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b. Determine the maximum amount of grain the structure can store.