9 × 28 = 252 square metres.
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9m x 5m = 45 m2
circumference = {pi} x diameter ~= 3.14 x 9m = 28.26m
9m
Area of a rectangle its length times its width, A LW 9m X 5m 45m2
1.8m x 3m x 9m = 48.6 cubic metres One cubic metre is 1000 litres, so there is 48,600 litres of water which will weigh 48.6 tonnes