# Help on velocity and displacement

QT
Question:
Simpson drives his car with an average velocity of 48.0 km/h to the east, How long will it take him to drive 144 km on a straight highway?

now i know you start out with the given which is :
Vavg= 48.0 km/h east
delta x= 144km
delta t= ?
so you have to find the delta t but i dont know how

## Answers and Replies

H_man
Umm. Isn't this just a case of $$Speed = \frac {Distance} {time}$$

ie... re-arranging this equation.

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Gold Member
MHB
But make sure to include direction, as velocity and displacement are vectors.

$$\vec{v}=\frac{{\triangle}\vec{d}}{\triangle{t}}$$

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