Question

A square tile is having side of length 15 cm. how many such tiles would be required to cover the square floor of a bathroom of side 3m

Answer 1

400
area of tile=15x15=225
area of bathroom=300x300=90000
no of tiles=90000/225=400

Answer 2

area of square tile=s²
=15²
=225cm²
area of bathroom=3000cm
=9000000cm²
no of tiles =total area/one tile
=9000000/225
=40000tiles are required.
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