1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The radius of the sphere $$3{x^2} + 3{y^2} + 3{z^2} - 8x + 4y + 8z - 15 = 0$$ is
A
2
B
3
C
4
D
5
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The direction ratios of the line perpendicular to the lines with direction ratios < 1, $$-$$2, $$-$$2 > and < 0, 2, 1 > are
A
< 2, $$-$$1, 2 >
B
< $$-$$2, 1, 2 >
C
< 2, 1, $$-$$2 >
D
< $$-$$2, $$-$$1, $$-$$2 >
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What are the coordinates of the foot of the perpendicular drawn from the point (3, 5, 4) on the plane z = 0 ?
A
(0, 5, 4)
B
(3, 5, 0)
C
(3, 0, 4)
D
(0, 0, 4)
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The lengths of the intercepts on the coordinate axes made by the plane 5x + 2y + z $$-$$ 13 = 0 are
A
(5, 2, 1) units
B
$$\left( {{{13} \over 5},{{13} \over 2},13} \right)$$ units
C
$$\left( {{5 \over {13}},{2 \over {13}},{1 \over {13}}} \right)$$ units
D
(1, 2, 5) units
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