Math

A bicycle wheel is 30 inches in diameter.

a. to the nearest revolution, how many times will the wheel turn if the bicycle is ridden for 3 miles.

b. suppose the wheel turns at a constant rate of 2.75 revolutions per second. What is the linear speed in miles per hour of a point on the tire?

asked by Thomas
  1. For a...
    Circumference = (pi)(d) = 30pi in

    3 mi = 190,080 in

    190,080 / 30pi = 6336 / pi = 2017 revolutions

    Not sure about the second part.

    posted by Michael
  2. Part A
    (3miles/1)*(5280ft/1mi)*(12in/1ft)*(1rev/15πin) is appx 4033 revolutions

    Part B
    (2.75rev/1sec)*(60sec/1min)*(60min/1hr)*(15πin/1rev)*(1ft/12in)*(1mi/5280ft) is appx 7.4 mph

    posted by Elizabeth
  3. The answers an owl as you at house of jug jug bird y'all finen




    posted by Kidrauhl
  4. Maths is so cool

    posted by Kidrauhl
  5. So this is a sensible answer basically you convert inches into miles which is about 190,080 inches then you do 30 times pie and divide them both

    posted by Kidrauhl

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