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NDA 2021
Exam
NDA
Year
2021
Subject
Mathematics
Chapter
Three Dimensional Geometry

NDA 2021 · Mathematics · Three Dimensional Geometry

The number of spheres of radius r touching the coordinate axes is

The number of spheres of radius rr touching the coordinate axes is

Options

  1. A4
  2. B6
  3. C8
  4. Dinfinite

Correct answer

C. 8

Step-by-step solution

There are 8 octants in coordinate system so, 8 spheres of radius rr touching the coordinate axes.
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