Question 537930
A boy ran to the store at 6 miles per hour, he walked back at 4 miles per hour. If the roundtrip took hom 10 minutes, how far is the store?
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Avg speed of the round trip is
2*6*4/(6+4) = 4.8 mi/hr
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d = r*t = 4.8 mi/hr * (10/60) hr = 0.8 miles round trip
--> 0.4 miles each way