The wheel on Ed's chair has a radius of 30 cm. If he travels 540π cm, the wheel will rotate _?_ times.

A) 6

B) 9

C) 12

D) 18

C = 2 * π * R

C = 2 * π * 30

C = 60π cm

540π/60π = 54/6 = 9 times

Answer: b) 9

So travel distance of a wheele

1 rotation distance=1 times circumverence so find circunference

circumfernec=2 times radius times pi

radius=30

30 times 2 time spi=60pi

so 60pi times x revolutions=540pi

divide both sides by 60pi

x revolutions=9

9 revolustion

B is the answer