A bicyclist pedals a bicycle at 40 revolutions per minute resulting in a speed of 7 mile per hour. How fast will the bicyclist go if he pedals 60 revolution per minute.

10.5m/h

Step-by-step explanation:

speed at 40 revolutions= 7/60 m/minute = 0.1167

circumference of wheel = 101167/40 = 7/2400

now,

at 60 pedals = speed = 60*7/2400 = 0.175m/minute

speed= 0.175*60 m/h = 10.5

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3