49m * 49 m = 2401 m2
200 mm * 100 mm = 20,000 mm2 = 0.02 m2
So number of blocks = 2401/0.02 = 120,050
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If it is a solid cube, then it 125 meters squared. If it just the floor, its 25.
From "Fluid Mechanics" by Streeter & Wylie (c) 1979 .3048m = 1 ft so... .3048 squared meters squared = 1 squared ft squared or... .0929 meters squared = 1 ft squared or... 1 ft squared /.0929 meters squared = 10.7639 ft squared/ meters squared so... 30 m2 times 10.7639 ft2/m2 = 322.9173 meters squared Answer: 322.9173 meters squared
218 squared meters * 10.764 squared feet per squared meter = 2346.552
Blocks are not all the same size.
7 metres squared = 8.372 sq yards.