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10 May, 04:03

On the return trip from the beach, you pedal hard for the first ten minutes and cover 4 miles. Tired, you slow down and cover the last 6 miles in 36 minutes. What is your average speed for the return trip?

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  1. 10 May, 04:31
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    Step-by-step explanation:

    On the return trip from the beach, you pedal hard for the first ten minutes and cover 4 miles.

    Speed = distance covered/time taken

    This means that your speed for the first 4 miles would be

    4/10 = 0.4 miles per minute

    Tired, you slow down and cover the last 6 miles in 36 minutes. This means that your speed for the last 6 miles would be

    6/36 = 0.17 miles per minute

    Therefore, your average speed for the return trip would be

    (0.4 + 0.17) / 2

    = 0.285 miles per minute
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