A train approaches a tunnel PQ. Inside a tunnel there is a rat at a point, the distance of which from P is equal to 5/12th of the length of PQ. When the train whistles, the rat runs towards the Point P of the tunnel to get exit then the Train catches it at Point P and if rat moves towards the Q for the exit then the Train catches it at Point Q. The speed of the train is how many times more than the speed of the rat?
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