A particle starts from rest and travels along a straight line with an acceleration a = (30-0.2v) ft/s2, where v is in ft/s. Determine the time when the velocity of the particle is v=30 ft/s.

A particle starts from rest and travels along a straight line with an acceleration a = (30-0.2v) ft/s2, where v is in ft/s. Determine the time when the velocity of the particle is v=30 ft/s.