The largest wheel of a penny-farthing - the precursor to the modern bicycle - has a diameter of 1.5 meters. If the largest wheel of a penny-farthing has rotated 75 times, about how far has a person on a penny-farthing ridden?

So first find the circumference

circumfernece=2 times pi times radius

2 times radius=diameter

diameter=1.5

using associative property of multipication which is a (bc) = (ab) c

so

c=2 times pi times r

c=pi times (2 times r)

c=pi times diameter

c=pi times 1.5

circumference is 1.5pi

multiply by 75

112.5pi is the answer

(pi is aprox 3.14 so 112.5 times 3.14=353.25 meters)

the answer is 112.5π meters or aprox 353.25 meters