Question 311695
The diameter of the tyre is 24 inches

radius = 12 inches.

the circumference = 2*pi*r
=2*pi*12
=75.4 inches

If the cycle has to go 1 mile it has to go 63360 inches

the number of revolutions the tyre has to make = 63360 / 75.4
= 840.31 revolutions

if the tyre makes 840.31 revolutions the the pedal has to make 

840.31 / 3
= 280.1 revolutions
OR 281 revolutions