Results 1 to 5 of 5

Math Help - Circumference of a circle HELP!!!!

  1. #1
    Newbie
    Joined
    Feb 2008
    Posts
    5

    Circumference of a circle HELP!!!!

    Hi there people, need help again! 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!


    Follow Math Help Forum on Facebook and Google+

  2. #2
    Moo
    Moo is offline
    A Cute Angle Moo's Avatar
    Joined
    Mar 2008
    From
    P(I'm here)=1/3, P(I'm there)=t+1/3
    Posts
    5,618
    Thanks
    6
    Hello,

    For the first one, why did you divide again by 100 ?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2008
    Posts
    5
    Well the question says, the wheel makes 100 complete amount of turns, therfore I have X it by 100, then I have divided by 100 because the question says to give the answer in meters, and the question started off by cm. I think I am right or wrong? can you help me with the 2nd 1 please???
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Moo
    Moo is offline
    A Cute Angle Moo's Avatar
    Joined
    Mar 2008
    From
    P(I'm here)=1/3, P(I'm there)=t+1/3
    Posts
    5,618
    Thanks
    6
    Oh, yeah, I missed this point ^^'

    For the second one...

    A circumference is L=65 pi/100 (in meter).

    So how many L are there in 500 ?
    This is as simply as it
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Feb 2008
    Posts
    5
    hi there another question i want to ask....
    There is a normal sized cylinder given, which says at the bottom of it, Base=75cm2 and 9cm. The question says, What is the area of the base?
    What is the length? and What is the volume? I got really confused with this question, because it says BASE, im stupid I dont understand this, please help anyone!!!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. circumference of the circle
    Posted in the Geometry Forum
    Replies: 1
    Last Post: November 3rd 2010, 11:33 PM
  2. pdf of area and circumference of a circle
    Posted in the Advanced Statistics Forum
    Replies: 6
    Last Post: May 10th 2010, 09:56 PM
  3. Spherical Circle Circumference
    Posted in the Differential Geometry Forum
    Replies: 1
    Last Post: October 13th 2009, 11:33 PM
  4. Circumference of a circle
    Posted in the Calculus Forum
    Replies: 10
    Last Post: June 12th 2008, 11:56 AM
  5. circumference of a circle
    Posted in the Geometry Forum
    Replies: 1
    Last Post: December 7th 2006, 07:39 PM

Search Tags


/mathhelpforum @mathhelpforum