The coordinates of any point on the given line are : (2r−1,3r+1,r+1) The distance of this point from (1,2,0) is √56 ⇒‌‌(2r)2+(3r)2+(r)2=(√56)2 ⇒14r2=56 ⇒r=±2 Hence, coordinates of the requiredpoint is: (3,7,3)‌ or ‌(−5,−5,−1)