Question 1138422: A bus travelling 200km has 10 stages at equal interval. The speed of the bus in the various stages was observed to be 10,15,20,25,20,30,40,50,30,40 per hour. Find the average speed at which the bus travels?
Answer by ikleyn(52824)   (Show Source):
You can put this solution on YOUR website! .
A bus travelling 200 km has 10 stages at equal  lengths.
The speed of the bus in the various stages was observed to be 10, 15, 20, 25, 20, 30, 40, 50, 30, 40  per hour.
Find the average speed at which the bus travels?
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Each interval is  = 20 kilometers long and the time for each interval is
 hours for the 1-st interval
 hours for the 2-nd interval
 hours for the 3-rd interval
 hours for the 4-rd interval
. . . . and so on . . . .
So, the total time is
Total time =  =
the common denominator is 600; so, I am continuing
=  =
 =  =  hours.
Then the average speed =  =  =  =  =  = 23.077 kilometers per hour. ANSWER
Solved and completed.
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