SOLUTION: A truck with a heavy load drove from boston to new york at 45 mph. After unloading, it returned to Boston at a speed of 65mph. WHat was it's average speed for the whole trip?

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Question 1197202: A truck with a heavy load drove from boston to new york at 45 mph. After unloading, it returned to Boston at a speed of 65mph. WHat was it's average speed for the whole trip?
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52817)   (Show Source): You can put this solution on YOUR website!
.
A truck with a heavy load drove from Boston to New York at 45 mph. After unloading, it returned to Boston
at a speed of 65mph. What was it's average speed for the whole trip?
~~~~~~~~~~~~~~~ 


For the average speed of the round trip (when the distances of both parts of the trip 
are the same) use the formula


    average speed =  =  =  = 53.182 mph  (rounded).    ANSWER

Solved.

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For this formula see the lesson
    - Calculating an average speed: a train going from A to B and back
in this site.   Find there many other similar solved problems.



Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
A truck with a heavy load drove from boston to new york at 45 mph. After unloading, it returned to Boston at a speed of 65mph. WHat was it's [sic] average speed for the whole trip?
========================
Avg speed of a RT =
= 2*45*65/(110) mi/hr
--------------------------
it's = it is
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