A shopper pushing a cart through a store

Question

moves 30.0 m south down one aisle, then
makes a 90◦
turn and moves 11.0 m. He
then makes another 90◦
turn and moves 22.0
m.
What is the magnitude of the smallest possible
displacement the shopper could have?
You are not given the direction moved after
any of the 90◦
turns, so there could be more
than one answer.
Answer in units of m.

Answer 1

19 m