How Is Average Speed Calculated for a Round Trip with a Lunch Break?

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To calculate the average speed for a round trip of 297.2 km with a lunch break, first determine the time taken for each segment of the trip. The first 148.6 km is traveled at 84.6 km/hr, resulting in a time of approximately 1.76 hours. The second segment of 148.6 km is covered at 50.6 km/hr, taking about 2.93 hours. Adding the 1.2-hour lunch break to the total travel time gives the overall time for the trip. The average speed is then calculated by dividing the total distance by the total time.
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Homework Statement



Calculate the average speed of a complete round trip in which the first 148.6 km is covered at 84.6 km/hr, followed by a 1.2-hour lunch and the final 148.6 km is covered at 50.6 km/hr.


Homework Equations





The Attempt at a Solution



148.6+148.6/.569+1.2+.341 = wrong
 
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Hi black_hole! :smile:

erm :redface: …

speed = distance/time, so time = distance/speed. :wink:​
 
Thread 'Correct statement about size of wire to produce larger extension'

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