The torque on A is 50 kN m (clockwise), C is a fixed shaft. The torque needed to fix C is

Question

An epicyclic gear train has 3 shafts A, B and (C) A is the input shaft running at 100 r.p.m. clockwise. B is the output shaft running at 250 r.p.m. clockwise. The torque on A is 50 kN m (clockwise), C is a fixed shaft. The torque needed to fix C is

              

         (a) 20 kN m (anti-clockwise)                 

        (b) 20 kN m (clockwise)

         (c) 30 kN m (anti-clockwise)                 

          (d) 30 kN m (clockwise)