Question 999898
A builder lays a path in a garden. he uses square slabs with sides 45 cm . long the path is 2 slabs wide and 9m longe. How many slabs dose the builder lay?
length of path is  9m long and  2 slabs wide  means 90 cm wide 
L of path =9m   and width =0.9 m
area of path =9x.9 =8.1 M^2
area of square slabs =.45x.45= .2025 m^2
no of slabs =total area of path/area of one slabs 

=9x.9/.45x.45=900x90/45x45=20x2 =40 slabs