Question

The diameter of each wheel of a bicycle is 28 inches28 inches. if you are traveling at a speed of 40 miles per hour40 miles per hour on this​ bicycle, through how many revolutions per minute are the wheels​ turning?

Answer 1

convert 10 miles into inches:
10 miles = 10*5280 = 52800 feet 633600 inches

(pi)d = (3.14) = 87.92 inches per revolution
633600/87.92 =7206.55 revolution per hour
convert to revolution per min:
7206.55 rev/hr * 1/160 hr/min
120.1 revolution per minute