Pittsburgh to NYC is 150 miles apart.

Question

If I am taking a train to Pittsburgh at 50 MPH, and my friend is taking the train to NY at 75 MPH, at what point do we pass each other?

 

Probably somewhere in Jersey

Answer 1

The trains are traveling in opposite directions - so, their relative speed will be the sum of the speeds.

Relative speed                  = 50+75=125MPH

Distance between NY & Pit = 150 miles

 

Speed = distance/time  or time = distance/speed.

So, time at which the trains cross each other is 150/125 = 1.2 hours

 

Distance traveled by train to Pittsburgh = 50MPH * 1.2 hours = 60 miles from NY

Distance traveled by train to NY           = 75MPH * 1.2 hours = 90 miles from Pit

 

     ---------------*----------------------

NYC       60miles    |          90 miles           Pittsburgh

Answer 2

Let after x hours they meet.

50x+75x=150

125x=150

x=1.2 hours

Answer 3

 Ignore this... sorry, it posted twice!