Achart showing speed and area rate of coverage, by acre per hour. 3 miles per hour: 5.96 acres per hour. 3.5 mph: 6.95. 4 mph: 7.95. 4.5 mph: 8.94. 5 mph: 9.94. 5.5 mph: 10.93. 6 mph: 11.92. 6.5 mph: 12.92. 7 mph: 13.91. 7.5 mph: 14.90. 8 mph: 15.90. 8.5: 16.89. 9: 17.88. 9.5: 18.88. 10: 19.87.a chart that shows engine speed and flow rate. at 500 rotations per minute, the flow rate is 1 gallon per minute. 750 rpm: 2.5 gpm. 1,000 rpm: 4 gpm. 1,250 rpm: 5.5 gpm. 1,500 rpm: 7 gpm. 1,750 rpm: 8.5 gpm. 2,000 rpm: 10 gpm. 2,250 rpm: 11.5 gpm. 2,500 rpm: 13 gpm. 2,750 rpm: 14.5 gpm.
the value for area rate of coverage (acre/hour) compared to speed (mph) is approximately: