28. Five mark example problem V

A passenger train takes $1 \ hr$ more than an express train to travel a distance of $240 \ km$ from Chennai to Virudhachalam. However, passenger train speed is less than that of an express train by $20 \ km$ per hour. Find the average speed of both trains.

 

Answer:

 

The average speed of the passenger train is  $km/hr$

 

The average speed of an express train is  $km/hr$