Three painters can paint three walls in three mins how many painters are needed to paint 27wall in 9 mins

There is 3 variables, the painters, walls and time. The problem is we need to know how many painters are needed. We know that increasing the walls will give us more painters. In this case, you need to divide the variable walls with time since it reversed so: 27walls / 9 minutesIt equal to: 3 walls/minute

Information provided is:3 painters = 3 walls/3 minutesEqual to : 3 paintes = 1 wall/minute

To make it 3 walls/minute, the painter needed will be: (3 walls/minute) / (1 wall/minute) x 3 painters = 9 painters

Answer is 9 painters