Starting at home, Emily traveled uphill to the hardware store for 60 minutes at just 6 mph. She then traveled back home along the same path downhill at a speed of 12 mph. What is her average speed for the entire trip from home to the hardware store and back?
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30 mins
it is an indirect variation
speed mins
6 60
12 x
6×60 = 12×(X)
6×60/12 = X
60/2 =
30 = X
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