From a point P, R is 5km due west and 12km due south. Find the distance between P and R
-
A.
5km -
B.
12km -
C.
13km -
D.
17km
Correct Answer: Option C
Explanation
Using Pythagoras theorem
(|PR|^2=|PO|^2+|OR|^2\
|PR|^2=5^2+12^2\
|PR|=sqrt{25+144}=sqrt{169}=13km)