Question

a lane 150m long and 9m wide is to be paved with bricks each measuring 22.5cm by7.5cm .find the number of BRicks required

Answer 1

First you have to take the area of lane and second you have to take the area of bricks and divide the area of lane by bricks. Keep on mind that the given measure of lane is in metre so you have to change in cm

Answer 2

Given lane length = 15000cm.
  
         lane breadth = 900 cm.

Area = l * b

         = 15000 * 900

         = 13500000.


Given brick length = 22.5cm

          brick breadth = 7.5cm

Area = l * b

         = 22.5 * 7.5

         = 168.75.


Number of bricks required = 13500000/168.75

                                             = 80000.

Hope this helps! :)