how many tiles of length 18 CM and breadth 12 cm are required to cover a wall of length 19.8 m and breadth 14.4 m ?
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42 tiles are required.
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Step-by-step explanation:
1 tiles area = 18×12 cm²
walls area = (19.8×100) × (14.4×100) cm²
tiles required 1980×1440/18×12
=1320
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