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Question
If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is
Options:
A .  R(θ + tan θ)
B .  2R(θ + tan θ)
C .  R(θ + cos θ)
D .  2R(θ + cos θ)
Answer: Option D
Answer: (d).2R(θ + cos θ)
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