Two persons start running towards each other, one from A to B and the other from B to A. They cross each other in 1 hour. The first person reaches B 1615 hours before the second person reaches A. If the distance between A and B is 8 km, then find the speed of the faster person.

A bus travels 57 part of its total journey at its usual speed. The remaining distance is covered by the bus at 14 of its usual speed. Due to reduced speed, it reaches its destination 180 minutes late. If the total distance is 280 km, what is the usual speed of the bus?

A train traveling at a speed of 45 km/h crosses a pole in 24 seconds. What is the length of the train?