John wants to put tiles in his kitchen. the room is rectangular and measures 20 ft. by 10 ft. if tiles cost $2.50 per square feet, how much will it cost john to tile his kitchen?

First we need to find out the area of the rectangular kitchen room.
Length of room is 20 ft and width is 10 ft.

So, area of rectangle = 20 x 10 = 200 ft²

The tiles costs $2.50 per square feet. Since the total area is 200 square feet, the total cost will be:

Total cost = Cost of tile per square feet x Total area
Total cost = 2.5 x 200
Total cost = $500

Thus, it will cost John $500 to tile his kitchen