Respuesta :

Solution

For this case we have the following info :

l= 18.5 ft

D= 20 ft

r= 20/2 = 10 ft

The surface area is given by;

[tex]SA=\pi r(l)=\pi\cdot10ft\cdot(18.5)=581.194ft^2[/tex]

Then the answer is:

581 ft^2

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