Question

If Ying Zyiyu covered the first 200 miles of a trip going at 50 mph and the last hundred miles going at 40 mph, what was his average speed for the entire trip?

Answer 1

Explanation:

200 miles=200/50=4hours.

100=100/40=5/2hours

13/2 hours. 200+100=300miles.

300(13/2)=300x2/13=600/13=46.15mph