(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

How long does it take an automobile traveling 60.0 km/h to become even with a car that is traveling in another lane at 40.0 km/h if the cars' front bumpers are initially 125 m apart?

2. Relevant equations

[tex]v_{average} = \frac{\Delta x}{\Delta t}[/tex]

3. The attempt at a solution

I'll just give an explanation because it seems like a pretty simple problem. I'm just getting a different answer than the book. Here goes:

I set the distance for the 60km/h car to d+125m since it has to travel the same distance as the 40km/h car plus the extra 125m that it had to catch up. Then I solved them for the variable (d) and set the 2 equations equal to each other, and then finished solving for time.

I ended up with:6.25 secondsThe book says it takes:22.5 seconds

the books answer seems wrong to me... can anyone verify this, or let me know what I did wrong? Thank you.

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# Homework Help: Simple volocity problem

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