If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle ? with horizontal, the perimeter of the canal is
Options
A. R(? + tan ?)
B. 2R(? + tan ?)
C. R(? + cos ?)
D. 2R(? + cos ?)
E. none of these.
Correct Answer
2R(? + cos ?)
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