500 tiles. 25 tiles * 20 tiles
Find the number of tiles, 20 cm x 14 cm x 6 cm, required to construct a wall 20 m long, 10 m high and 70 cm thick. If 10% of the wall is filled with mortar.
A hall of length 24 m and breadth 20 m is to be paved with equal square tiles. What will be the size of the largest tile so that the tiles exactly fit and also find the number of tiles required?
