Question

how many square tiles of side 20cm will be needed to pave a footpath which is 2metres wide and surrounds a rectangular plot 40m long and 22m wide

Answer 1

Area required= (40+2)(20+2)-(40)(20)= 124
Area of square tile in
$m^{2}$
= (0.2)^2=0.04

Tiles= 124/0.04= 3100