A train approaches a tunnel AB. Inside the tunnel a goat located at a point i.e. 5/12 of the distance AB measured from the entrance 'A'. When the train whistles, the goat runs. It the goat moves to the entrance of the tunnel 'A'. The train catches the goat exactly at the entrance. If the goat moves to the exit B, the train catches the goat exactly at the exit. Find the ratio of speed of train and goat.