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Posted by on Sunday, February 27, 2011 at 2:35am.

A floor is covered by 800 tiles measuring 10 cm square.How many square tiles of side 8 cm would be needed to cover the same floor?

  • maths - , Sunday, February 27, 2011 at 8:24am

    area covered by 10 by 10 tiles = 800 x 100 or 80000 cm^2
    each 8 by 8 covers 64 cm^2
    so number of smaller tiles = 80000/64 = 1250 tiles

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