SOLUTION: If you drive for 100 miles at 65 miles per hour. And then you drive for 80 miles at 75 miles per hour. What is your average speed for the trip?

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Question 1037383: If you drive for 100 miles at 65 miles per hour. And then you drive for 80 miles at 75 miles per hour. What is your average speed for the trip?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Average speed is always:
[ total distance traveled ] / [ total time spent traveling ]
--------------
1st part of trip:
+100+=+65%2At+
+t+=+100%2F65+
+t+=+1.53846+
----------------
+80+=+75t+
+t+=+80%2F75+
+t+=+1.06667+
---------------
Ave speed = +%28+100+%2B+80+%29+%2F+%28+1.53846+%2B+1.06667+%29+
+180+%2F+2.60513++=+69.09453+
Average speed was 69.09453 mi/hr