The motion of a particle is described by the relation x = t²- 10t + 30, where x is in metres and t in seconds. The total distance travelled by the particle from t = 0 to t = 10 seconds would be

ANS:A - zero

V= t^2 - 10t + 30.
dv/dx = 2t - 10.

If t=0,
So 2 x 0 - 10 = -10.

If t = 10,
So 2 x 10 - 10 = 20 - 10 = 10.

Total distance 10-10 = 0 Answer.