the tiles of "40x20cm" are to be laid on the floor of a room 8m long and 4m broad find the number of tiles needed to cover the floor
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Answer:
20
Step-by-step explanation:
area of tile = 2(40+20)=120cm^2
dim. of floor = 800x400cm
ar of floor= 2(800+400)=2400cm^2
no. of tiles needed to cover the floor = 2400/120 = 20
no. of tiles = 20
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