A room 540cm long and 420cm wide is to be paved with square tiles of side 30cm.How many such tiles will be required?
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In a room 540 long and 420cm wide comment me Hiiii
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no. of tiles = area of room / area of tiles
= 540 cm × 420 cm / 30 × 30
54 × 42/ 9
= 6× 42
= 252cm square
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