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

• A. is 20 kNm anticlockwise
• B. is 30 kNm anticlockwise
• C. is 30 kNm clockwise
• D. cannot be determined as the data is insufficient