\textbf{170-} A body of mass $5\,\text{kg}$ moves uniformly in a circular path, making $30$ revolutions per minute. If the radius of the path is $2$ meters, what is the kinetic energy of the body?
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(1) $10\pi^2$ \qquad (2) $20\pi^2$ \qquad (3) $80$ \qquad (4) $40$
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