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The machine gun fires 240 bullets per minute. If the mass of each bullet is 10 g and the velocity of the bullets is $600\; ms^{-1}$ the power (in kW) of the gun is :

\[\begin {array} {1 1} (a)\;43200 & \quad (b)\;432 \\ (c)\;72 & \quad (d)\;7.2 \end {array}\]
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(D) 7.2
Hence D is the correct answer.
answered Mar 24, 2014 by meena.p

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