SOLUTION: How many square feet of tarp is required to completely cover the roof of a 20×15 foot building? The roof has a single peak running along the 20 foot axis and the roof is at a 45 d

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Question 1159942: How many square feet of tarp is required to completely cover the roof of a 20×15 foot building? The roof has a single peak running along the 20 foot axis and the roof is at a 45 degree angle.
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming the roof ends flush with the walls of the 20ft x 15ft building, you need enough to cover the slanted roof surfaces of +%2815%2F2%29%2Asqrt%282%29+ft each.
There are two such slanted surfaces, each 20ft long, so +20%2A%2815%2F2%29%28sqrt%282%29%29%2A2+ sq ft or +highlight%28+300sqrt%282%29+%29+ sq ft, approximately 424.26 sq ft.
In reality, the answer depends on the depth of the eaves.