Math Prize 2012 Problem 1
Source:
September 24, 2012
Problem Statement
In the morning, Esther biked from home to school at an average speed of miles per hour. In the afternoon, having lent her bike to a friend, Esther walked back home along the same route at an average speed of 3 miles per hour. Her average speed for the round trip was 5 miles per hour. What is the value of ?