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14 April, 02:49

One sign shows 15 miles in 20 minutes what is the speed in miles per hour.

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  1. 14 April, 06:00
    0
    45 miles/hour

    Step-by-step explanation:

    We need the speed in miles per hour so we need to changes minutes to hours

    20 minutes * 1 hour / 60 minutes = 1/3 hour

    Speed = distance / time

    = 15 miles / (1/3 hour)

    =15 * 3 miles/hour

    = 45 miles / hour
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