candyharps candyharps
  • 18-03-2016
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A wheel has a radius of 15 cm. Approximately how far does it travel in 4 revolutions?

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StacksOfBooks
StacksOfBooks StacksOfBooks
  • 18-03-2016
The circumference is the distance around a circle.  In one revolution, the wheel will turn completely around, meaning the wheel has traveled a distance equal to the circumference.  So, we need to find the circumference of this wheel.  The circumference is equal to 2 times pi times the radius.  Rounding pi to 3.14, we get a circumference of about 94.2 cm.  Times 4, because we have 4 revolutions, the wheel has traveled about 376.8 cm.

Answer: about 376.8 cm
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