Julie drives 80 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 30 mph and half the distance at 50 mph . On her return trip, she drives half the time at 30 mph and half the time at 50 mph .How long does it take Julie to complete the trip to Grandmother's house?

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Question:

Julie drives 80 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 30 mph and half the distance at 50 mph . On her return trip, she drives half the time at 30 mph and half the time at 50 mph .How long does it take Julie to complete the trip to Grandmother's house?

Answers

the answer is 2 hours 

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