word problem about circles

Question

Suzie goes for a bike ride. She has a meter for counting the number of rotations of the front wheel, which has a radius of 15cm. if her front wheel made 3000 turns, how many kilometres did she ride? (correct to 2 decimal places)

Answer 1

So logically every full rotation of a wheel is going to give you an amount of distance traveled equal to the circumference of the wheel so all we need to do is find that and then multiply by the 3000 revolutions and convert to the proper units.

1. convert to circumference: (formula pi * diameter // radius *2) meaning 3.141592... * (15*2)
2. multiply that by the number of turns so 3000 times the circumference
3. convert units we are in centi and we need kilo so using [K] H D S D [C] M We know to move the decimal point 5 places to the left