A grain silo has the shape of a right circular cylinder surmounted by a hemisphere (see the figure). If the silo is to have a capacity of 604? ft.3, find the radius and height of the silo that requires the least amount of material to construct.
?
Hint: The volume of the silo is 
, and the surface area (including the floor) is 
.
?
?
A. 
B. 
C. ?
D. ?
Answer: B
Mathematics
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