Question 12(b)
How many tiles whose length and breadth are 12 cm and 5 cm respectively will be needed to fit in a rectangular region whose length and breadth are 70 cm and 36 cm respectively?
Area of the rectangular region = 70 cm×36 cm = 2520 cm2.
Area of one tile = 5 cm×12 cm = 60 cm2.
Number of tiles = Area of regionArea of one tile.
= 252060 = 42.
Thus, 42 tiles are required.