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OpenStudy (anonymous):
A cylindrical grain bin has a radius of 9 feet and a height of 30 feet. What is the surface area of the bin?
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OpenStudy (anonymous):
the surface area of the cylinder top is pi*r^2 the diameter of the circle is 2*9=18, so the cylinder wall is just b*h = (18*pi) * 30 Then add the surfaces. Usually you will use double the circle area since a cylinder has a top and bottom, but it's a silo on the ground, so i don't know if that would be included
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