An athlete swims from the north end to the south end of a 50.0m pool in 20.00s and makes the return trip to the starting point is 22.0s

Is there a question in there?

To find the average speed of the athlete, we need to divide the total distance covered by the total time taken.

The distance covered in one direction, from the north end to the south end, is 50.0m. The time taken for this trip is 20.00s.

Therefore, the athlete's average speed for this part of the journey can be calculated as:

Speed = Distance / Time

Speed = 50.0m / 20.00s

Speed = 2.50 m/s

Similarly, for the return trip from the south end to the north end, the distance covered is still 50.0m, but the time taken is now 22.0s.

Therefore, the athlete's average speed for the return trip can be calculated as:

Speed = Distance / Time

Speed = 50.0m / 22.00s

Speed = 2.27 m/s

To find the average speed of the entire journey, we need to add the average speeds for both parts of the journey and divide by 2.

Average Speed = (Speed1 + Speed2) / 2

Average Speed = (2.50 m/s + 2.27 m/s) / 2

Average Speed = 2.39 m/s

Therefore, the average speed of the athlete for the entire journey is 2.39 m/s.