Question 324515
Trains A and B are traveling in the same direction on parallel tracks.
 Train A is traveling at 60 miles per hour and train B is traveling at 80 miles per hour.
 Train A passes a station at 3:25p.m. 
If train B passes the same station at 3:40p.m., at what time will train B catch up to train A?
:
from the given information, we know that train B is 15 min (1/4 hr) behind
 train A, when train A passes the station
:
The distance between the trains at this time: {{{1/4}}} * 80 = 20 mi
:
Let t = time required for train B to catch train A
:
write a distance equation: Dist = speed * time
:
Train B travel dist = Train A travel dist + 20 mi
80t = 60t + 20 
80t - 60t = 20
20t = 20
t = 1 hr 
:
3:25 + 1 = 4:25 pm, B catches A