A ship's wheel is rotated 128°. Its radius is 22 cm. How far would a point on the wheel's edge move in this rotation?

1 Answer
Jul 17, 2016


Distance =#49.15cm#


It is important to realise that a rotation of 128° is simply a fraction of a full rotation of 360°. The distance the point will move is the same fraction of the whole circumference.

Distance = a fraction of the circumference
Distance = #128/360xx 2 pir#

=#128/360 xx2 xxpi xx22cm#

The accuracy of the final answer will depend on which value of #pi# is used.

Distance =#49.15cm#