Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph?  Answers
A) 37.5 mph
B) 40 mph
C) 50 mph
D) 44 mph
E) None of these
Explanation :   Average speed=Total Distance/Time.   Total distance travelled by Jim = Distance covered in the first 3 hours + Distance covered in the next 5 hours.   Distance covered in the first 3 hours = 3×60=180 miles   Distance covered in the next 5 hours= 5×24=120 miles   Therefore, total distance travelled = 180+120= 
<gadget id="calculator">180+120</gadget>
<output>300</output>
300 miles.   The total time taken= 3+5= 
<gadget id="calculator">3+5</gadget>
<output>8</output>
8 hours.   Hence, the average speed= 300/8= 
<gadget id="calculator">300/8</gadget>
<output>75/2 = around 37.5</output>
37.5 mph.   37.5 mphnswer : 37.5 mph
<result>A</result>
Jim travels the first 3 hours of his journey at 60 mph speed and the remaining 5 hours at 24 mph speed. What is the average speed of Jim's travel in mph?