A conference hall of 6 m × 4 m is to be tiled using 60 cm × 40 cm tiles. How many are needed?
Show answer & explanation
Correct answer: C
Explanation
Given:
Size of hall = 6 m × 4 m
Size of tile = 60 cm × 40 cm
Formula:
Number of tiles = (Area of hall) / (Area of one tile)
6 m = 600 cm
4 m = 400 cm
Area of hall = 600 × 400 = 240000 cm²
Area of one tile = 60 × 40 = 2400 cm²
Number of tiles = 240000 / 2400 = 100