SOLUTION: A girl runs to the park to get her bicycle. Then she rides the bicycle back home. The total time for the round-trip is 45 minutes. Her running speed is 8 KPH and her riding speed i

Question 651326: A girl runs to the park to get her bicycle. Then she rides the bicycle back home. The total time for the round-trip is 45 minutes. Her running speed is 8 KPH and her riding speed is 24 KPH. How far is the park from her home?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A girl runs to the park to get her bicycle. Then she rides the bicycle back home. The total time for the round-trip is 45 minutes. Her running speed is 8 KPH and her riding speed is 24 KPH. How far is the park from her home?
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Average speed of a round trip is
2*8*24/(8 + 24) (proof available)
= 384/32 = 12 km/hr
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d = r*t = 12*0.75 = 9 km round trip
One way = 4.5 km

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