The length and foot of the perpendicular from the point (7, 14, 5) to the plane \[2x+4y-z=2,\]are [AISSE 1987]

The length and foot of the perpendicular from the point (7

1.	The length and foot of the perpendicular from the point (7, 14, 5) to the plane \[2x+4y-z=2,\]are [AISSE 1987]
A.	\[\sqrt{21},(1,\,2,\,8)\]
B.	\[3\sqrt{21},(3,\,2,\,8)\]
C.	\[21\sqrt{3},(1,\,2,\,8)\]
D.	\[3\sqrt{21},(1,\,2,\,8)\]
Answer» E.

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The length and foot of the perpendicular from the point (7, 14, 5) to the plane \[2x+4y-z=2,\]are [AISSE 1987]

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