fourth year
I am not some trained pony, that you can throw out a problem just so I can prove that I can do math. I suppose I could do it with pencil and paper to make it a little more interesting. I will pass my test without any coaching, thank you. By the way if the sewer is 20 feet below the basement floor, it will still back up if the sewer gets flooded 25 feet high. But this person said the city told them that their below grade floor is too close to the sewer invert elevation. And no amount of jockeying with the pipe grade is going to change that.
