A force of  (2^i-4^j+2^k)N acts at a point  metre(3^i +2^j-4^k)  from the origin. The magnitude of torque is

(2^i-4^j+2^k)N acts at a point  metre(3^i +2^j-4^k)  from the origin. The magnitude of torque is (a) Zero (b)  24.4 N-m (c)   0.244 N-m (d)  2.444 N-m Ans. b (7)