City A to city B, Michael drove for 1 hour at 80 mph and for 3 hours at 60 mph. What was the average speed for the whole trip? Choose the correct answer.
A) 57
B) 57.5
C) 58.2
D) 60
E) 62
The total distance is 1×80+3×60=240   And the total time is 4 hours. Hence,   Average Speed=(Total 60istance/Total Time)=240/4= 
<gadget id="calculator">240/4</gadget>
<output>60</output>
60   Answer : 60
<result>D</result>
City A to city B, Michael drove for 1 hour at 80 mph and for 3 hours at 60 mph. What was the average speed for the whole trip?