The distance between Chembur, Mumbai and Kothrud, Pune is 150 km. I start driving from Kothrud at 7:00 a.m. and travel towards Chembur at 80 km/hr. My wife starts driving from Chembur at 7:30 a.m. and travels towards Kothrud at 70 km/hr. At what time will we cross each other??