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Displacement of a body of mass 2 kg varies with time as $s=t^2+2t$.Where s in meters t in seconds. The work done by the force acting an body during the time t=2s to t=4s is

\[(a)\;36\;J \quad (b)\;64\;J \quad (c)\;100\;J \quad (d)\;120\;J\]

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