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Area to be covered = 12ft * 14ft = 3657.6 mm * 4267.2 mm = 15,607,711 mm2
Area of each slab = 900mm * 600 mm = 540,000 mm2.
So, number of slabs required = 28.9 ie 29 slabs.
That is the mathematical answer. It assumes that almost all offcuts can be used up and that there are no breakages. In "real life" it is advisable to allow 5-10% for wastage.
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∙ 11y ago
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