**Question **: The position of a particle x (in meters) at a time t seconds is given by the relation r = 3t(i) – t^2(j) + 4(k) . Calculate the magnitude of velocity of the particle after 5 seconds

(a) 3.55

(b) 5.03

(c) 8.75

(d) 10.44

**Answer**: The Right option is (d)

**Solution **: