Question

how many square slabs each with side 90cm are needed to cover a floor of area 81m square​

Answer 1

Answer:

The required No. of slabs are 7290.

First calculate the area of the floor(in m)- 81 times 81.

It will give the total area which is 6561

Now to find the no. of square bricks required divide that area with the area of each brick that is 0.9 times 0.9 ( 90 cm = 0.9m)

you will get it as follows (81×81)/(0.9×0.9)