Entire surface area of the hemisphere including its base area:-
(2*pi*10^2)+(pi*10^2) = 300*pi square units
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2(pi)radius^2
Total surface area = 1847.26 sq cm.
The radius of the hemisphere is 12 units.
A cylinder 10 feet high and 5 feet in radius has a surface area of 471.24ft2
it is 3 times pi times r square, where r is the radius.