# 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?

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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