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6 ft x 6 ft = 1828.8 mm * 1828.8 mm = 3,344,509.4 mm2 Area of each slab = 400*400 mm2 = 160,000 mm2 So minimum number of slabs = 3,344,509.4/160,000 = 20.9 ie 21 slabs. However, this requires almost all the offcuts to be used and, unless the shape is an exact number of tiles across, you will end up with an area that is a mosaic.
The answer will depend on the size of the patio slabs.
140
14
4
6 ft x 6 ft = 1828.8 mm * 1828.8 mm = 3,344,509.4 mm2 Area of each slab = 400*400 mm2 = 160,000 mm2 So minimum number of slabs = 3,344,509.4/160,000 = 20.9 ie 21 slabs. However, this requires almost all the offcuts to be used and, unless the shape is an exact number of tiles across, you will end up with an area that is a mosaic.
The answer will depend on the size of the patio slabs.
20 I believe
140
You will need 63 44cm x 44cm slabs to cover that area.
14
1125
400 at least
41,000 of them.
The answer will vary slightly depending on assumptions: will the slabs have a space between them, and will you be cutting the slabs to fill fractions. 21 feet is equal to 14.2 of the 450 mm slabs. 19 feet is equal to 12.9 of the slabs. To complete the rectangular area, 14.2 x 12.9 = 183 slabs.
A square slab measuring 0.6 metres all round has an area of 0.36 square metres. This means that to cover an area of 24 square metres you will need 66 slabs and 2/3 of a slab. Covering the area may be problematic if 1/3 of a slab and 2/3 of a slab become involved, of lesser fractions, depending on the exact length and width which gave the area of 24 - and if there is a pattern to maintain.