The speed of the car per minute is 3,520 feet.
Step-by-step explanation:
First, we shall convert miles to feet to find how many feet the car can travel in one hour. Since there are 5,280 feet in a mile, 40 x 5,280 = 211,200. So, now we have 211,200 ft/h, but we have to convert to minute instead. Since there are 60 minutes in an hour, 211,200 divided by 60 = 3,520. Therefore, 3,520 ft/min