Is my set up right?\n\n1. Jane, Paul and Peter can finish painting the fence in 2 hours. If Jane does the job alone she can finish it in 5 hours. If Paul does the job alone he can finish it in 6 hours. How long will it take for Peter to finish the job alone?\n\nJane = 1/5\n\nPaul = 1/6\n\nPeter = 1/t\n\nLet t = length of time it will take Peter to finish the job alone.\n\nTotal time = 2 hours\n\n1/5 + 1/6 + 1//t = 2\n\nYes?\n\n2. Jim can dig a hole by himself in 12 hours. John can do it in 8 hours. Jack can do it in 6. How long will it take them if they all work together?\n\nJim = 1/12\n\nJohn = 1/8\n\nJack = 1/6\n\nLet t = length of time for all three to finish the job.\n\n1/12 + 1/8 + 1/6 = 1/x\n\nYes?