Question

trains A and B are traveling in the same direction on a parallel track. train A is traveling at 40 miles per hours and train B is traveling at 50 miles per hour. train a passes a sation at+7:25 pm. if train B passes the same station at+7:37 pm at what time will train B catch up to train A?

Answer 1

+8.25 pm

Answer 2

first we know that b is faster than a 10 mile per hour.
note that at the station a is 12 minute in front of b which mean a is 8 mile in front of b when b reach the station.
then we just calculate how much time b need to catch up a
since b is faster than a 10 mile per hour, then we can use some math to cal time for b to catch up 8 mile