Question

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?

Answer 1

Distance =`49.15cm`

Explanation:

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`