ride for time t
walk for time (6-t)
31 t + 5(6-t) = 121
31 t + 30 - 5 t = 121
26 t = 91
t = 3.5 hours on bike
================
check
3.5 * 31 + 2.5 * 5 = ?
Jim began a 121-mile bicycle trip to build up stamina for a triathlete competition. Unfortunately, his bicycle chain broke, so he finished the trip walking. The whole trip took 6 hours. If Jim walks at a rate of 5 miles per hour and rides at 31 miles per hour, find the amount of time he spent on the bicycle.
1 answer
1 answer