William travels to school in two different ways. Either he walks to school and takes the bus home, or he takes the bus to school and walks home. In each case his total travelling time is 40 minutes. If he were to take the bus both ways, his total travelling time would be 20 minutes. How many minutes would it take if he walked both ways?
+128474 It must take him 10 min to travel one way on the bus since it takes him 20 min in total when he goes by bus both ways
Therefore.....when he walks and takes the bus the time he walks 1/2 the total distance must be 40 - 10 = 30 min
Therefore....if he walked the whole distance, it would take him twice as long = 1 hour
