Answer:
25.2398 miles per hour.
Step-by-step explanation:
Circumference of the wheel = 2π(21) = 131.947 inches. Convert to miles. 131.947/12 = 10.9956 ft. 10.9956/5280 = 0.002082 miles. Multiply by 202 to get miles per minute. 0.002082*202 =.420664 miles per minute. Multiply by 60 to get miles per hour. 60*.420664 = 25.2398 miles per hour.
