From a point P, R is 5km due west and 12km due south. Find the...
MATHEMATICS
WAEC 2005
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: C. 13km
Explanation
Using Pythagoras theorem
\(|PR|^2=|PO|^2+|OR|^2\\
|PR|^2=5^2+12^2\\
|PR|=\sqrt{25+144}=\sqrt{169}=13km\)
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