A hall is 20 m long and 12 m wide. How many tiles of size 50 cm × 20 cm are needed to cover the hall?
2400
Hall area = 20 × 12 = 240 sq m = 2,400,000 sq cm.
Tile area = 50 × 20 = 1000 sq cm. Number of tiles = 2,400,000 / 1000 = 2400.
Hence, 2400.
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