Travel time question

Question

A train leaves Roseville heading east at 6:00 am at 40 miles per hour. Another eastbound train leaves on a parallel track at 7:00 am at 50 miles per hour. What time will it be when the two trains are the same distance apart?

Answer 1

40t = 50(t-1)

 

40t = 50t - 50

 

0 = 10t -50

 

50 = 10t

 

t=5

 

After 5 hours the first train will have traveled 40x5 = 200 miles.

The second train will have traveled 50x4 = 200 miles.