



 
Hi Laura, The volume of a cylinder is the area of the base times the height. Your base is a circle of diameter 10 cm so its radius is 5 cm. Thus the area of the base is π r^{2} = π 5^{2} = 25 π square centimeters. Hence the volume is 25 π × height = 250 π cubic centimeters. To find the volume of the box find the area of the base (length × width) and then multiply by the height, 10 cm. This will give the volume in cubic centimeters. The second part of the problem asks for the volume of the box minus the total volume of 20 cylinders. I hope this helps,  


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