Question

Un 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?

Answer 1

4 hours

Explanation:

The speed of the first car is

`v_1 = 120 km/h`

While the speed of the second car is

`v_2=80 km/h`

The time it takes for each car to cover a distance d is

`t=(d)/(v)`

where

d = 960 km is the total distance covered

For car 1, the time taken is:

`t_1=(960)/(120)=8 h`

For car 2, the time taken is:

`t_2=(960)/(80)=12 h`

Therefore, the difference in time is:

`\Delta t =t_2-t_1 =12 -8 = 4 h`