Question

Billy likes to go cycling.

His bike has wheels of diameter 80 cm.

He has a counter on his bike which
counts the number of revolutions
the wheels make.


One day the counter shows 350 revolutions.

How far has Billy cycled?

Give your answer to the nearest metre.

Answer 1

560 metres

Explanation:

80 cm in metres is 0.8 metres.

After 1 revolution any point on the wheel will be back to the original position before moving. 0.8 times 2, which gives us 1.6 metres. In 1 revolution the bike travels 1.6 metres.

Now 1.6 metres times 350 gives us 560.

So the answer is 560 metres.