A car tyre make 8 turns of 90° in one direction. How many rotations did the car tyre make?

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Solution

The correct option is B 2
Number of 90° turns = 8
The angle through which the car tyre moves in 4 turns = 90 $\times$ 4
= 360°.
360° angle movement means one complete rotation.

It means in 4 right angle turns, the car tyre will make one complete rotation.

Hence, in 8 right angle turns, number of rotations the car will complete = 8 $\div$ 4
= 2 rotations

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