UPSC NDA I 2011 Mathematics Paper

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For the next four (4) items that follow:
ABC is a triangle right angled at B. The hypotenuse (AC) is four times the perpendicular (BD) is four times the perpendicular (BD) drawn to its from the opposite vertex and AD<DC.

Question : 35 of 120

Marks: +1, -0

What is the radius of the sphere x2+y2+z2−x−y−z=0?

√‌
3
4
√‌
1
2
√‌
3
2
‌
1
3

Validate

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