Posted by Suzi on September 16, 2002 at 22:57:22:
We need help with my son's math - On a recent 6 hour bike trip of 70 miles, Lila spent 2 hours on the first part of the trip where her average speed was half of her average speed on the second part. What was her speed on the first part? We have been given the answer which is 7 miles/hour. We must set up the problem. Any help???