belle345
belle345
25.04.2021 • 
Mathematics

As part of routine maintenance, you need to drain the sludge basin for cleaning. The basin is 9 feet by 10 feet. The pump draining the basin has a capacity of 7.8 gallons per minute, and it took 13 hours to completely drain the basin. How deep is the basin? There is 4.5 inches of sludge at the bottom of the tank- what percent of the tank depth is the sludge?

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