Let $P$ be the foot of the perpendicular from the point $Q ( 10 , - 3 , - 1 )$ on the line $\frac { x - 3 } { 7 } = \frac { y - 2 } { - 1 } = \frac { z + 1 } { - 2 }$. Then the area of the right angled triangle $P Q R$, where $R$ is the point $( 3 , - 2,1 )$, is\\
(1) $9 \sqrt { 15 }$\\
(2) $\sqrt { 30 }$\\
(3) $8 \sqrt { 15 }$\\
(4) $3 \sqrt { 30 }$