SOLUTION: Elvin drove halfway from ashton to dover at 40 mi/h abd the rest of the way at 60 mi/h. What was his average speed for the whole trip? (Hint: let the distance for the whole trip be

Question 29961: Elvin drove halfway from ashton to dover at 40 mi/h abd the rest of the way at 60 mi/h. What was his average speed for the whole trip? (Hint: let the distance for the whole trip be, say, 100 mi.)
Found 2 solutions by Earlsdon, jb007mi6:
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
First, let's find the time it took Elvin to drive each leg of the trip.
First leg:
d1 = 40 miles and r1 = 40 mph.

hour.
Second leg:
d2 = 40 miles and r2 = 60 mph.

hours.
Now we need to find the "weighted" average speed for the entire trip. Let's call that M.

mph.
Answer by jb007mi6(53) (Show Source): You can put this solution on YOUR website!
average...40+60
----- = 50mph
2

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