A ship sailed 15 km north, then 20km east followed by 10km south. Find its displacement from its starting point

Answer 1

The first and last legs of the journey are equivalent to a displacement of 5 km north.

Add, as vectors, the net displacement vectors of 5 km north and 20 km east. Use the Pythagorean theorem.

sqrt(5^2 + 20^2) = sqrt(425) = ___ km

Answer 2

with the sqare root of 425,the answer will be 20.6km