Town P is 4 km south of Town Q, and Town R is 3 km west of Town P. What is the straight-line distance from Q to R?
Correct answer: A. 5 km
From Q, go 4 km south to P and then 3 km west to R. The straight-line distance is √(4² + 3²) = 5 km. R is to the southwest of Q.
medium