A bicycle has tyres whose outer diameter is 70cm. The cyclist rides along a level road.
a. (a) Calculate, in metres, the distance covered when each tyre makes 500 complete revolutions.
b. (b) How many complete revolutions must each tyre make to cover 1.1km?
c. (c) If the wheels turn uniformly at 60 revolutions per minute, find the time taken, in minutes and seconds, to travel 1.1km.