SOLUTION: i have 540 sq ft of floor to cover with tiles. each tile is 20.5" by 20.5" How many tiles do i need?

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Question 646894: i have 540 sq ft of floor to cover with tiles.
each tile is 20.5" by 20.5"
How many tiles do i need?

























Found 2 solutions by MathLover1, stanbon:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

the area of floor is 540ft%5E2 .
each tile is 20.5in by 20.5in; so, find the area of a tile
20.5in%2A20.5in=420.25in%5E2 ....now convert in%5E2 into ft%5E2

There are 144in%5E2 to a ft%5E2 because 1+ft=12in
%28420.25%2F144%29ft%5E2=2.918ft%5E2
now, divide the area of a floor with area of a tile to get a number of tiles needed
540ft%5E2%2F2.918ft%5E2=185.05825908156271418779986291981=185

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
i have 540 sq ft of floor to cover with tiles.
each tile is 20.5" by 20.5"
How many tiles do i need?
-------------------------
area of each time: 20.5^2 = 420.25 sq inches
420.25 sq in (1 ft/12 in)^2 = 420.5/144 = 2.918 sq ft.
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# of tiles = 540/2.918 = 185.03
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Cheers,
Stan H.