You can put this solution on YOUR website!
There are 5280 feet in a mile, so if you are going 52 miles in an hour, you are going 52 times 5280 feet in an hour. There are 3600 seconds in an hour. So if you are going 52 times 5280 feet in an hour, then you are going that many feet divided by 3600 feet in one second. The result times 40 is the number of feet you will travel in 40 seconds.
John
My calculator said it, I believe it, that settles it