Posted by **Arch** on Monday, August 12, 2013 at 8:26am.

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 -
**Steve**, Monday, August 12, 2013 at 1:18pm
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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