math algebra
posted by scooby .
Trains A and B are traveling the same direction on parallel tracks. Train A is traveling at 100 mph and train B is traveling 110 mph. Train A passes a station at 6:10 A.M. If train B passes the same station at 6:40 A.M. at what time will train B catch up with Train A?

They are 1/2 hour apart. To catch up, they have to travel the same distance.
d=100(t)
d=110(t.5)
set them equal
100t=110t55
55=10t
t= 5.5 hrs.
check my thinking. 
would that be 11:30 am?