From a point P, R is 5km due west and 12km due south. Find the distance between P and R
index-0
5km
index-1
12km
index-2
13km
index-3
17km
Correct Answer:
C
Using Pythagoras theorem
\(|PR|^2=|PO|^2+|OR|^2\
|PR|^2=5^2+12^2\
|PR|=\sqrt{25+144}=\sqrt{169}=13km\)