Question

How many square tiles of side $40cm$ will be required to pave a footpath which is $2m$ wide and surrounds a rectangular plot $80m$ by $44m$ ?

Answer 1

Area of rectangular plot=$44\times 80$
=$3520c{m}^2$
Area of rectangular plot+footpath=$48\times 84$
=$4032m^2$
Therefore,
Area of footpath=$4032-3520$
=$512m^2$
Area of square tile=${40}^2$
=$1600c{m}^2$
=$\frac{1600}{100\times 100}$
=$0.16m^2$
Therefore,
number of tiles required=$\frac{512}{0.16}$
=$3200$