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
waec 2005mathematics

The correct answer is C. 13km

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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