Question 680450: For the first 130 miles of the trip Dan drove at 65 miles per hour. Then because of a wreck on the Interstate slowing down traffic, he drove at 50 mph for the next two hours. What was her average speed , in miles per hour, for the entire trip?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! For the first 130 miles of the trip Dan drove at 65 miles per hour. Then because of a wreck on the Interstate slowing down traffic, he drove at 50 mph for the next two hours. What was her average speed , in miles per hour, for the entire trip?
-------------
d = r*t
t = d/r
130/65 = 2 hours
----------------
Divide the total distance by the total time --> avg speed
|
|
|
