Asked by andrew
how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)
Answers
Answered by
Steve
a circle of radius r has circumference 2pi r, so
one lap = 6pi feet
So, 20 laps = 120pi feet
one lap = 6pi feet
So, 20 laps = 120pi feet
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