Question

Mrs brown wants to tile her kitchen floor the tiles are 3 Inches on each side. The floor is 10 feet by 15 feet. How many tiles does she need?

Answer 1

Wouldn't she need 40 times to run along the 10 ft side?
Wouldn't she need 60 tiles to run along the 15 ft side?

So what is 40 x 60 ?

or

area of floor = 150 square feet.
She will need 16 tiles for each square foot.
So .....

Answer 2

convert feet to inches:
10 feet = 120 inches
15 feet = 180 inches

get the area of the floor:
120in x 180in= 21,600in^2

divide the area of the floor to the area of the tile:

area of the tile is "9in^2"

21600in^2 divided by 9in^2 is 2,400 tiles.