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JEE Questions for Maths Three Dimensional Geometry Quiz 17 - MCQExams.com
JEE
Maths
Three Dimensional Geometry
Quiz 17
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The direction ratios of the diagonals of a cube which joins the origin to the opposite corner are (when the 3 concurrent edges of the cube are co-ordinate axis)
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1, 1, 1
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2, –2, 1
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1, 2, 3
The direction ratios of the lines OA and OB are 1, –2, –1 and 3, –2, 3. Then the direction cosines of the normal of plane AOB where O is the origin, are
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4/3
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Variable
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None of these
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A line
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A plane
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Explanation
Since planes are parallel
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A parallelopiped is formed by planes drawn through the points (2, 3,and (5, 9,parallel to the co-ordinate planes. The length of a diagonal of the parallelopiped is
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