Question

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Answer 1

Divide the area of square of bathroom by the area of one square tile.
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(a cm) for square tile = 15cm
area of one square tile = a²
= 15² = 225cm²------(i)
(a cm) for square bathroom = 3m
= 3x100cm = 300cm
area of square bathroom = a²
= 300² = 90000cm²------(ii)
from (i) and (ii)
number of tiles required to cover the bathroom = area of bathroom/area of one square tile
= 90000/225 = 400
∴, 400 tiles are required to cover the bathroom.
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