Question

A room os 20m long and 6 m side. Its floor os to be covered with rectangular tiles of size 25cm by 20 cm .How many tiles will be required ? Also find the cost of these tiles at 25 rupees per tiles.

Answer 1

Area of floor =2000×600=1200000
Area of tile = 25×20=500
No of tiles = 1200000÷500=2400
Cost of 2400 tiles =25×2400= 60000

Answer 2

let the number of tiles required be n
l=20 m = 2000 cm
b = 6 m = 600 cm
Area of floor = l×b
= 2000×600
=1200000cm Square
area of each tile = 25×20
=500 cm Square
No. of tiles required = Area of floor ÷ area of
tile
=1200000÷500
=2400 tiles

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