jim began a 92-mile bicycle trip to build up stamina for a triathlon competition. Unfortunately, his bicycle chain broke, so he finished the trip walking. The whole trip took 4 hours. If Jim walks at a rate of 3 miles per hour and rides at 35 miles per hour, find the amount of time he spent on the bicycle.

Question

jim began a 92​-mile bicycle trip to build up stamina for a triathlon competition.​ Unfortunately, his bicycle chain​ broke, so he finished the trip walking. The whole trip took 4 hours. If Jim walks at a rate of 3 miles per hour and rides at 35 miles per​ hour, find the amount of time he spent on the bicycle.

oobleck · Answer

since time = distance/speed, if he rode for x miles, then x/35 + (92-x)/3 = 4 x = 87.5 miles now you can find the time he spent riding.