A storage bin for corn consists of a cylindrical section made of wire mesh, surmounted by a conical tin roof, as shown in the figure. The height of the roof is one-third the entire height of the structure. If the total volume of the structure is 1,200 feet 3 and its radius is  feet, what is its height? Round your answer to the nearest tenth.

?
Hint: use the formulas for the volume of the solid.
?
Volume of cone = 
Volume of cylinder = 
?

?

A. 9.9 feet
B. 12.8 feet
C. 15.6 feet
D. 4.1 feet
E. none of these


Answer: D

Mathematics

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A.

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C.

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