Question

A tile is a square of side 20cm . How many such tiles would be required to cover the floor of a square bathroom of side 3 m ?

Answer 1

$bthroom \: \: area = {a}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = {3}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 900 {cm}^{2} \\ \: area \: of \: the \: titles = {a}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \ \: \: \: \: \: \: = {2}^{2} \: \: = 4cm \\ no \: of \: titles \: required = 900 \div4 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 225 \\ \\ therefore \: 225 \: titles \: are \: required$

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