There are two different ways connected by railway between city A and city B. The first way is 180 km lesser than the second way. Train P travels along the first way and covers the distance between the cities in 10 hours. Train Q travels along the second way and covers the distance in 12 hours. If the speed of train Q is 5 km/hr more than the speed of train P, then, what is the speed of train P (in km/hr)?