12. edie can paint a wall in 3 hours. dan can paint the same wall in 6 hour. if
12. edie can paint a wall in 3 hours. dan can paint the same wall in 6 hour. if the work together how many hours will it take edie and dan to paint the wall? a) 1 hour b) 1.5 hours c) 2 hours d) 4.5 hours