N automóvil corre a 120 kilómetros por hora y otro a 80 kilómUetros por hora; si deben recorrer 960 kilómetros, ¿con cuántas horas de diferencia llega el primero del segundo?

4 hours

Step-by-step explanation:

Both cars here travel with uniform motion (constant velocity), so the relationship between distance covered, time taken and speed is:

where

t is the time taken

d is the distance covered

v is the speed of the car

Here we have:

(speed of the 1st car)

(speed of the 2nd car)

d = 960 km is the total distance covered by each car

So for car 1, the time taken is:

While for car 2, the time taken is:

And so, the difference in arrival time between the two cars is: