if a bicycle has 26 inch diameter wheels, the front chain drive has a radius of 2.2 inches, and the back drive has a radius of 3 inches. how far does the bicycle travel every one rotation of the cranks (pedals)?
...unless I misunderstood.
Ratio of turn on rear gear
Rear wheel turns the same portion of a full turn as the rear gear
A full turn would be it's circumference
(because it is given in diameter rather than radius as the gears are)
Ratio of a full turn
Well, I ended up with the same answer because the 2's ended up canceling out in the ratio. Is this what you came up with earboth? I don't have much confidence in my answer.
The answer given, 58.8997 should be 59.8997
Also, the response from earboth sez:
"When calculating the proportions the factor 2 cancels out so that your final result is correct."
The word "proportions" here should be the word "ratio".