<PRE><B>Question 380202</B>
 A man drives to town 30 miles away at a speed of 45 mph and arrives in 40 mins. on his return he takes 60 mins. 
What is his average speed for the total trip? 

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Average speed = (total distance)/(total time)
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Total distance = 60 miles
Total time = 40 min + 60 min = 1 2/3 hrs
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Average speed = 60/(5/3) = 36 mph
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Cheers,
Stan H.</PRE>