Answer :

AL2006
Acceleration = (change of speed) / (time for the change)

Change in speed = (30 - 0) = 30 m/s.
Time for the change = 8 sec.

Acceleration = 30/8 = 3.75 m/s per second.

a=v-u/t
=30-0/8
=30/8
=3.75m/s^2