SOLUTION: A train departs from Town A at 3:00pm to travel to Town B. Its average speed for the journey is 90km/h, and it arrives at 5:00pm. A second train departs from Town A at 3:10pm and a

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: A train departs from Town A at 3:00pm to travel to Town B. Its average speed for the journey is 90km/h, and it arrives at 5:00pm. A second train departs from Town A at 3:10pm and a      Log On

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Question 749225: A train departs from Town A at 3:00pm to travel to Town B. Its average speed for the journey is 90km/h, and it arrives at 5:00pm. A second train departs from Town A at 3:10pm and arrives at Town B at 4:30pm.
What is the average speed of the second train?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The 1st train takes 2 hrs to go from A to B
Let +d+ = distance from A to B
+d+=+90%2A2+
+d+=+180+ Km
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The 2nd train takes 1 hr and 20 min which is
+1.333+ hrs to go the same distance
+180+=+r%2A1.333+
+r++=+135+
The average speed of the 2nd train is 135 km/hr