A non-stop bus goes from one station to another station with a speed of 54km per hour. The same bus returns from the second station to the first station with a speed of 36km hr-1. find the average speed of the bus for the total journey
A non-stop bus goes from one station to another station with a speed of 54km per hour. The same bus returns from the second station to the first station with a speed of 36km hr-1. find the average speed of the bus for the total journey