A Drive Shaft Running at 2500 Rpm Has Outer Diameter $220 \mathrm{~kW}$

A drive shaft running at 2500 rpm has outer diameter 60 mm and inner diameter 40 mm. The allowable shear stress in the shaft is 35 MPa.
The maximum power that can be transmitted is approximately: (A) $220 \mathrm{~kW}$
(B) $240 \mathrm{~kW}$
(C) $288 \mathrm{~kW}$
(D) $312 \mathrm{~kW}$