sentence1: Gwen drove an average speed of 15 miles per hour for the first 40 miles of a tripthen at a average speed of 30 miles / hr for the remaining 40 miles of the trip if she made no stops during the trip what was Gwen ' s avg speed in miles / hr for the entire trip
sentence2: Gwen drove an average speed of less than 15 miles per hour for the first 40 miles of a tripthen at a average speed of 30 miles / hr for the remaining 40 miles of the trip if she made no stops during the trip what was Gwen ' s avg speed in miles / hr for the entire trip