Civil Engineering > GATE 2021 SET-2 > Vector Calculus
The unit normal vector to the surface X2 + Y2 + Z2 - 48 = 0 at the point (4, 4, 4) is
A
(1 / √2, 1 / √2, 1 / √2)
B
(1 / √3, 1 / √3, 1 / √3)
C
(2 / √2, 2 / √2, 2 / √2)
D
(1 / √5, 1 / √5, 1 / √5)

Correct : b

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