Using the relation between velocity, distance and time, it is found that the trip took 2 hours.
Velocity is distance divided by time, that is:
[tex]v = \frac{d}{t}[/tex]
On the first part of the trip, a time of t was taken, with an average speed of 60 km/hour, hence:
[tex]60 = \frac{d}{t}[/tex]
d = 60t
On the second part, a time of t + 1 was taken, with an average speed of 40 km/hour, hence:
[tex]40 = \frac{d}{t+1}[/tex]
d = 40(t + 1).
Since the distance is equal for both parts, we can equal the equations and find the time.
60t = 40t + 40
20t = 40
t = 2.
The trip took 2 hours.
More can be learned about the relation between velocity, distance and time at https://brainly.com/question/24316569
