Question

Medal award! A bicycle with 19 in diameter wheels has its gear set so that the chain has a 5-in. radius on the front sprocket and 4-in radius on the rear sprocket. The cyclist pedals at 105rpm.

Answer 1

Hey can u help me with some math questions please

Answer 2

bella280, sure which question?

Answer 3

c for front sprocket=2 pi r=2pi*5=10 pi
no. of revolutions per minute=105
distance covered by front sprocket (circular)=105*10pi=1050 pi
c for rear sprocket =2 pi r=2*pi*4=8 pi
no. of revolutions by rear sprocket per minute=1050 pi/8pi=525/4
diameter of the wheel=19in
radius=19/2=9.5 in
c for wheel (distance in 1 revolution)=2 pi r=2 pi*9.5=19 pi
distance in 525/4 revolutions=19*525/4=?

Answer 4

so 2493.75in the linear speed?

Answer 5

This is linear speed 2493.75 in / minute

Answer 6

for some reason it says it's wrong