Physics

To find the cyclist's average speed for the entire trip, we need to calculate the total distance traveled and the total time taken.

Calculate Total Distance:

The cyclist travels 30 km north and then 54 km south.

Total Distance = 30km + 54km = 84km

Calculate Total Time:

Time for the first segment: 2 hours

Time for the second segment: 4 hours

Total Time = 2hours + 4hours = 6hours

Then, calculate average speed:

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