Two men are running in the same direction with speeds of 6 km per hour and `7 1/2k m` per respectively. A train running in the same direction crosses them in 5 sec and `5 1/2` sec respectively. The length and the speed of the train are respectively. 22.92 m (approximately) and 22 km per hour 22 m (approximately) and 22.5 km per hour 22.90 m (approximately) and 20.5 km per hour 22.92 m (approximately) and 22.5 km per hour