Answer:
To calculate the total distance Kobi needs to drive, you simply need to add the distances together:
1. Kobi drives 27.54 kilometers to school.
2. Kobi drives 21.86 kilometers to the library.
To find the total distance, you add these two distances together:
27.54 km + 21.86 km = 49.40 km
Therefore, Kobi needs to drive a total of 49.40 kilometers.