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OpenStudy (anonymous):
A wheel has a radius of 15 cm. Approximately how far does it travel in 4 revolutions?
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OpenStudy (anonymous):
\[r=15\] so circumference is\[ 2\pi r\]=\[2\pi*15 = 30\] in 4 revolutions the wheel will travel \[4*30\pi = 120\]
OpenStudy (anonymous):
sorry \[120 \pi\]
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