SOLUTION: an aeroplane flies around a square whose side is 100 mile long taking first side at 100 mile per hour the second side 200 mile per hour the third side 300 miles per hour and the fo

Question 1046593: an aeroplane flies around a square whose side is 100 mile long taking first side at 100 mile per hour the second side 200 mile per hour the third side 300 miles per hour and the fourth side 400 mile per hour,what is the average speed of aeroplane.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Find the time for each side.
----
D = r*t
T = d/r
------
100/100 = 1 hour = 60 mins
100/200 = 30 mins
100/300 = 20 mins
100/400 = 15 mins
-------
Add the times --> 125 mins
R = d/t = 400/125 mi//minute
R = 60*400/125 mi/hr
R = 192 mi/hr
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