05-01-2016
Mathematics

Answered

A wheel has a diameter of 21 inches. About how far does it travel if it makes 30 complete revolutions?

Verified Answer :

pingwin09 pingwin09

06-01-2016

You can use the circumference of a circle, that is
C = 2π(d/2)
The one revolution of a wheel is
C = 2π(21/2) = 21π in
For 30 complete revolutions, you will get
30(21 π) = 630π in = 1979.20 in

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