1. 45*6 = 270 miles total53*2 = 106 miles in first two hours270-106 = 164 miles in next 4 hoursat average speed of 164/4 = 41mph in next four hours2.118/60 = 1.967 hours one way118/72 = 1.638 hours on returnTotal 3 hours & 36+ minutes3.39/51 = 0.765 hours which is 46 minutes ..2:12 PM she left the house
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