- #1

dyavol33

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## Homework Statement

So here's a problem I need help with for my physics class that's due tomorrow night.

On a road trip, a driver achieved an average speed of 76 km/h for the first 86.0 km and an average speed of 38 km/h for the remaining 54.0 km. What was her average speed (in km/h) for the entire trip? Round your final answer to three significant figures.

## Homework Equations

Umm... see next part?

## The Attempt at a Solution

So I know that the first thing I have to do is find how long it takes for the driver to drive the first and second parts of the road trip using the average speed given for each part. But I'm not exactly sure how to do it. For the first part, do I divide 76 km/h by 60 minutes to get how far they travel in 1 minute? Then times it by how far they traveled?

So it would be 76/60=1.267, then 1.267*86=109? Am I somewhat doing this right? Any help would be greatly appreciated!