Circle circumference

Question

Billy goes Cycling.His bike has wheels of diameter 75cm. He has invented a counter for his bike, which counts the number of revolutions the wheels make. One day the counter shows 180 revolutions. How far has billy cycled? Give your awnser to the nearest Metre.

Answer 1

Each revolution is the equivalent to the circumference of the wheel which would be 75pi cm

Tital distance would be 180 revolutions x 75pi=42441.5 cm

There are 100cm/meter so this is 424 meters

Answer 2

Formula for circumference?

180(75π) = ?