<PRE><B>Question 242483</B>
The car drives 35mph for 35 miles, then 50mph for 100miles, and 53mph for 53miles. What is the car average speed for the whole trip? 
-------------------------------------------------------------
Average speed = (total distance)/(total time)
-------------------------------------------------------------
35 mph for 35 miles takes 1 hr.
----------------
50 mph for 100 miles takes 2 hr.
----------------
53 mph for 53 miles takes 1 hr.
=====================================
Average speed = (35+100+53)/(1+2+1) = 188/4 = 47 mph
=====================================
Cheers,
Stan H.</PRE>