Sizes Per. Area Imp Gal. US Gal Litres  
  21 X 30 86' - 7" 503.0 15990 19201 72659  
  24 X 36 102' - 5" 690.0 22500 27018 102241  
  27 X 40 114' - 4" 863.0 28760 24536 130687  
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