Question

The cylindrical walls of an open-top silo have an outside diameter of 5.0m, a thickness of 50cm, and a height of 10m. A can of paint covers 12m2, and cost $ 14.98. How much will it cost to paint the silo, including the inside, the outside, and the top of the walls?

Answer 1

outside surface area=pi d*h=100pi
inside surface area=pi*(4)*10=40pi
so total area =140pi=439.822
549 dollars

Answer 2

the real answer is $ 374.50 but i got $376.01

Answer 3

sry calculation mistake
outside are=50pi
it you take base area=25/4pi

so t.area=385/4pi
377.46$