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A rectangular garden of dimension 12m by 9m is enclosed by a uniform concrete walk 1.5m wide. If the walk is to be tiled, how many 30cm- square tile are needed to tile the entire walk?

  • Math -

    The area of the walk is 15*12 - 12*9 = 72m^2

    72m^2 / (.3m)^2 = 800 tiles

    Or, you can figure 5 tiles to cross the width of the walk. The garden is 12/.3 = 40 tiles long and 9/.3 = 30 tiles wide.

    You will need
    two strips of 40x5 on the long side
    two strips of 30x5 on the short side
    4 corners of 5x5

    400+300+100 = 800

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