There are six pillars P, Q, R, S, T and U in a colony. P is 60 m to the south of Q. T is 110 m to the north of S. U is 40 m to the east of S. Q is 70 m to the west of S. R is 60 m to the south of S. What is the direct distance between Q and U?
1
130 m
2
170 m
3
110 m
4
100 m