



 
Hi Chris, First find the area of the bottom of the pool (a circle) and the area of each sheet of foam (a rectangle). Area of a Circle = π × radius^{2} = π × (diameter/2)^{2} = π × diameter^{2}/4 = 3.14 × (27ft)^{2}/4 = 572.265 ft^{2} Area of rectangle = length × width = 4 ft × 8 ft = 32 ft^{2} By dividing the area of the bottom of the pool by the area of one sheet of foam, it will let us know how many times bigger the bottom of the pool is than one sheet. Area of bottom of the pool / area of sheet of foam = 572.265 ft^{2} / 32 ft^{2} = 17.88 Since the number sheets must be a whole number, 18 sheets of foam will be needed to cover the bottom of the pool. There will undoubtedly be some wastage when you cut the sheets so it is possible you will need 19 sheets. Janice  


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