Question

A road 100m long and 20m wide to be paved with bricks. Each measuring by 25cm by 10cm. Find the no. Of bricks?

Answer 1

since the brick dimensions divide the road dimensions evenly, it does not matter which way the bricks are laid (assuming that the brick's edges are parallel with the road's).

So, we can just divide the area of the road by the area of a brick:

(100m * 20m)/(.25m * .10m) = 80,000 bricks