Hi, I am having trouble getting started on this physics problem...it seems fairly simple just need some hints:
You drive on Interstate 10 from San Antonio to Houston, half the time at 73 km/h and the other half at 90 km/h. On the way back you travel half the distance at 73 km/h and the other half at 90 km/h. What is your average speed a) from San Antonio to Houston, b) from Houston back to San Antonio, and (c) for the entire trip?
I know average speed is the total distance during the trip divided by the total time for the trip but I am not sure how to determine those.