A granular substance such as sand naturally settles into a cone-shaped pile when poured from a small aperture. Its height depends on the humidity and adhesion between granules. The angle of elevation of a pile, ?, is called the angle of repose. If the height of a pile of sand is 11 feet and its diameter is approximately 34 feet, determine the angle of repose. Round answer to nearest degree.
A. 29o
B. 30o
C. 31o
D. 32o
E. 33o
Answer: E
Mathematics
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