A Propeller Is Spun Up from Rest to 1500 Rpm

Multiple Choice

A propeller is spun up from rest to 1500 rpm under the influence of a constant torque in 15.0s.If the work done by the engine in giving the propeller its final angular velocity is 25kJ,what is the torque supplied by the engine?

A) 21Nm
B) 11 Nm
C) 42 Nm
D) 21 Nm
E) 130 Nm