Emily traveled uphill to the hardware store for 60 minutes at just 6mph she then traveled back home the same path downhill at a speed of 12 mph what is her average speed for the entire trip
The trip home at twice the speed took half as long. She traveled the whole 12 miles in 1.5 hours, so had an average speed of ... (12 mi)/(1.5 h) = 8 mi/h
