Question

A bicycle tire has a diameter of twenty-six inches. If a pebble is stuck in the tire's treads, about how far will the pebble travel with each rotation of the tire?

forty point eight two inches

eighty-one point six four inches

five hundred thirty point six six inches

two thousand one hundred twenty-two point six four inches

Answer 1

the question is about the circunference of the tire
C=2*pi*radius, radius = diameter/2, radius=26/2=13
C=2*pi*13
C=26pi
assuming pi is 3.14
C=26*3.14=81.64 in