Question

choose the correct answer ​

Answer 1

Answer:

Ans is 105 cm/s.

Explanation:

Displacement of particle is given by:

x=2-3t+ 4t³

dx Velocity, v = = −3+12t² dt

Att = 3 s

v −3+ 12 x 9 = -3

v = 105 cm/s.