Micheal drove to a friend\'s house at a rate of 40mi/h. Hereturned by the smae r

Question

Micheal drove to a friend's house at a rate of 40mi/h. Hereturned by the smae route at a rate of 45mi/h. The driving timefor the round trip was 4h. What distance did Micheal drive? This is my chart...what did i do wrong, or what do i donext? Name      Rate         Time      Distance trip1       40mph         t               40t trip2        45mph      4-t         45(4-t) total         N/A            4h            2D       Micheal drove to a friend's house at a rate of 40mi/h. Hereturned by the smae route at a rate of 45mi/h. The driving timefor the round trip was 4h. What distance did Micheal drive? This is my chart...what did i do wrong, or what do i donext? Name      Rate         Time      Distance trip1       40mph         t               40t trip2        45mph      4-t         45(4-t) total         N/A            4h            2D      

Explanation / Answer

Distance there = Distance Home 40t = 45(4-t) 40t = 180 - 45t 85t = 180 t = 2.12 hrs Distance = 40(2.12) = 84.71 miles Total distance (there and back) = 169.41 miles

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