Edward cleaned a windowpane with a width of 5 feet and a length of 3 feet in 14 of an hour. What is the speed, in square feet per hour, at which Edward cleaned the pane?

There are a few ways to solve this problem.

We know the areas is Area = Length x Width

Area = 5 x 3 = 15 ft^2

To find out the speed in square feet per hour we divide 15 / 14

15 / 14 = 1.07142857143 ft^2 per hour