Bilal wants to cover his room floor measuring 8 meters by 4 meters with tiles that each measure 25 cm by 20 cm. How many tiles does he require to cover the entire floor?

Explanation

First, convert the floor dimensions to centimeters: 8 m = 800 cm and 4 m = 400 cm. The floor area is 800 cm × 400 cm = 320,000 cm². Each tile covers 25 cm × 20 cm = 500 cm². Dividing the floor area by the tile area gives 320,000 ÷ 500 = 640 tiles needed.