SOLUTION: A large storage building is in the shape of a hemisphere. If it took 40 liters of paint to cover the floor, how many liter are expected to paint the exterior of the building?

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Question 589111: A large storage building is in the shape of a hemisphere. If it took 40 liters of paint to cover the floor, how many liter are expected to paint the exterior of the building?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A large storage building is in the shape of a hemisphere.
If it took 40 liters of paint to cover the floor, how many liter are expected to paint the exterior of the building?
:
Let x = amt of paint required to paint the outside of the hemisphere
:
The surface area of the hemisphere to the area of the floor
%282%2Api%2Ar%5E2%29%2F%28pi%2Ar%5E2%29 = x%2F40
cancel pi^r^2
2 = x%2F40
x = 80 liters to paint the exterior of the hemisphere