A speeder passes a patrolman when traveling at 95 km/hr. The patrolman has troble starting his car, and so doesn't go after the speeder for 30 minutes. When he does, the parolman purses the speeder with a speed of 125km/hr.
a) how long (in hours) does it take the patrolman to catch up to the speeder and pull her over, from the time the patrolman started moving?
b) how far has the patrolman travelled?