loss of the torque due to viscosity of the lubricant is

Question

A journal bearing has a shaft diameter of 40mmm and a length of 40mm. The shaft is rotating at
20 rad/s and viscosity of the lubricant is 20mPa.s. The clearance is 0.020mm. The loss of the
torque due to viscosity of the lubricant is approximately

(a) 0.040 Nm

(b) 0.252 Nm

(c) 0.400 Nm

(d) 0.652 Nm