A bike wheel has a radius of 40 inches. If Mary rides the bike 1 mile (63,360mi.), approximately how many times has the wheel rotated?
Perimeter of wheel:
P = 2 r π
P = 2 ∙ 40 ∙ 3.1416
P = 251.328 in
1 mile = 63 360 inches
63 360 / 251.328 = 252.1
approx.252
By the way.
Wheel has a RADIUS of 40 inches.
Is it too much?