A) \[\frac{\pi }{5}\]rad.
B) \[\frac{2\pi }{5}\] rad
C) \[\frac{3\pi }{5}\] rad.
D) \[\frac{4\pi }{5}\]rad.
Correct Answer: B
Solution :
A wheel moves 360 round in half an hour, then it makes an angle per second \[=\frac{360\times 2\pi }{30\times 60}=\underline{\frac{\mathbf{2}\pi }{\mathbf{5}}}\] radians
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