To travel distance of 1240 km, the train Q takes 11 hours more than the train P. If however, the speed of the train Q is increased 25%, it takes 4.8 hours more than train P. Then, what is the speed of train P?
1
60 km / hr
2
62 km / hr
3
80 km / hr
4
40 km / hr
5
50 km / hr