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Darrin rode his bike the 30 miles out to the lake in 2 hours. The wind was against him on the return trip which took 3 hours. Find Darrin's average speed

 Feb 26, 2020
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His roundtrip was 30 + 30 = 60 miles

His total time was 5 hours

 

miles per hour   =    60 miles/5 hours = 12 m/h average

 Feb 26, 2020

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