Circumference of a circle HELP!!!!
Hi there people, need help again(Doh)! with simple stuff like these!
Here's the first set of questions from a math book...
The diamter of a motorcycle wheel is 65cm
a) Work out the distance, in metres, the motorcycle travels when the wheel makes 100 complete turns.
: For this one I think worked it out and here is what I have got...
65 x PI = 204.203.. x 100 = 20420.35.. ÷ 100 = 204.2 (please correct me if wrong:)
For the next question I really got confused:::
b) Work out the number of complete turns the wheel makes when the motorcycle travels 500m.
.... confused SO MUCH, how do I work this OUT! PLEASE HELP!
I understand all the stuff about circumference, PI, radius, diameter, area, semi-circle, but when I come upon to these question of car tyres etc. I really get confused, any tips and ideas on how to mastermind this out???
THANKYOU! FOR YOUR HELP!