question_answer

John goes 10 km towards east from a point P to another point Q. From Q he moves 7 km towards his left reach at another point S and again 10 km towards his left and finally reach at point R. If the distance towards north and east are represented by positive integer then which integer will represent his final distance from P?

A) \[-27\,km\]        

B) 7 km

C) \[-7\,km\]          

D) 17 km

E) None of these