davisbeth1kr
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A silo (based not included) is to be constructed in the form of a cylinder surmounted by hemisphere. The cost of construction per square unit of surface area is 5 times as great for the hemisphere as it is for the cylindrical sidewall. Determine the dimensions to be used if the volume is fixed at 1200 cubic units and the cost of construction is to be kept to a minimum. Neglect the thickness of the silo and waste in construction. The radius of the cylindrical base (and of the hemisphere) is __ ft.

Verified Answer :

meerkat18

Based on your question where a silo is to be constructed in form of a cylinder surmounted by hemisphere. So based on the given data in your questions i conclude with an answer of this one: 
C = 5(2 pi r^2) + 2 pi rh
= 10 pi r^2 + 2 pi r [12000/pi r^2 - 2r/3] and its ZERO

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