Answer:
54.4 kilometers apart
Explanation:
Looking at a compass, it can be found that the direction North and the direction East form a right angle (90 degrees).
This scenario can be depicted as a triangle, where the sisters' travel routes are the legs and their distance apart is the hypotenuse.
The hypotenuse can be found by the Pythagorean Theorem:
Solve for c:
So, the sisters are 54.4 kilometers apart.