To express the speed in terms of hours, we need to convert the time from minutes to hours. There are 60 minutes in an hour, so we divide x by 60 to convert it to hours.
1. Speed = y / x = (4/20x) / (x/60) = (4/20)(60/x) = 12/x kilometers per hour
2. Speed = y / x = (4/20x) / (x/60) = (4/20)(60/x) = 3/5x kilometers per hour
3. Speed = y / x = (4/20x) / (x/60) = (4/20)(60/x) = 0.6/x kilometers per hour
The equation y = 4/20x describes the number of kilometers y that a van travels in x minutes. What is the constant speed of the van in terms of hours? Use pencil and paper. Express the speed in three different ways.
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