From a point P, R is 5km due west and 12km due south. Find the distance between P and R
- 5km
- 12km
-
13km
- 17km
The correct answer is: C
Explanation
\(|PR|^2=|PO|^2+|OR|^2\\
|PR|^2=5^2+12^2\\
|PR|=\sqrt{25+144}=\sqrt{169}=13km\)