Question

a taxi leaves the station x for station y every 10 minutes . simultaneously , a taxi leaves the station y also for staion x every 1o minutes. the taxis move at the same constant speed and go from x to y or vice versa in 2 hours , how many taxis coming from the other side will each taxi meet enroute from y to x?

Answer 1

2 hours/10 min = 12 min.