City A to city B, Andrew drove for 1hr at 42 mph and for 3 hours at 60 mph. What was the average speed for the whole trip?	Choices:	A) 55.5	B) 57.5	C) 61	D) 61.5	E) 62.5
The total distance is 1×42+3×60=222   And the total time is 4 hours. Hence,   55.5verage Speed=(Total Distance/Total Time)   =222/4= 
<gadget id="calculator">222/4</gadget>
<output>111/2 = around 55.5</output>
55.5   55.5
<result>A</result>
City A to city B, Andrew drove for 1hr at 42 mph and for 3 hours at 60 mph. What was the average speed for the whole trip?