Can't seem to get to the answer of 10:50
The qs is:
Station A is 40km from station B.
A train leaves from station A at 10:00 & travels at 30km/hour toward station B.
At what time will it pass a train travelling at the same speed from B to A, which left at 10:20?
Well I might start by asking where train 1 has got to by the time train 2 starts out :
@ 30km/hr it will have gone 10 km in 20 mins.
So the trains will now be 30km apart - consider this to be a new starting point
Both travelling at 30km/hr means they will reach the halfway point (15km) in 30 minutes
ie at 10.50