1) The Commuter bus takes two hours to get downtown: The express bus, averaging 25mph faster, takes 45 minutes to cover same route. Determine average speed for commuter bus?
2) You commute to work distance of 40 miles and return on same route at the end of day. Your average rate on return trip is 30 miles per hour faster that the average rate on outgoing trip. If round trip takes two hours, find the average rate on outgoing trip to work?