The size of one tile is 3 x 3 inch? Find the number of tiles required to cover the roof of area 9 x 9 square feet.
[Hint: I foot = 12 inches
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Answer:
area of 1 tile =3*3 =9inch
area of roof= 9*9 =81 feet
area of roof =81×12 inch
total tiles required= area of roof /area of 1 tile
=81×12/9
=9*12
108 tiles required
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