Final answer:
The farmer will have a magnitude of displacement of 140 meters in 2 minutes and 20 seconds.
Step-by-step explanation:
To find the magnitude of displacement, we need to calculate the distance covered by the farmer. Since the farmer moves in a square field, each side of the square is 10m. Therefore, the distance covered per side is 10m.
Now, we need to calculate the total distance covered by the farmer in 2 minutes and 20 seconds.
2 minutes and 20 seconds is equal to 140 seconds. As the farmer covers 10 meters in 10 seconds, we can calculate the total distance covered as follows:
- Distance covered per second: 10m / 10s = 1m
- Total distance covered: 1m * 140s = 140m
Therefore, the magnitude of displacement in 2 minutes and 20 seconds is 140 meters.