Question

A bicycle wheel has diameter twenty-six inches. Approximately how far does the bike travel when the wheel makes 5 complete rotations?

eighty-one point six four inches

one hundred sixty-three point two eight inches

four hundred eight point two inches

eight hundred sixteen point four inches

Answer 1

i am giving out a medal to whoever answers it first

Answer 2

please help me

Answer 3

by each rotation the bicycle move a distance equal to the perimeter of the wheel
the perimeter of the circle is \[2\pi r\]

Answer 4

so that would be 14 then what would i do

Answer 5

no 14 or 13 which one

Answer 6

r= d/2 = 26/2 = 13
2*pi*r = 81.64
the bicycle moves 81.64 inches for each rotation
for 5 rotations how much would it be ?

Answer 7

ok thanks that helped a lot

Answer 8

you got the answer ?

Answer 9

yes 408.2

Answer 10

correct.. welcome :)

Answer 11

one last thing on this photo what is it called