Multiple choice

If a sphere of radius (r) is divided into four identical parts, then the total surface area of the four parts is :

  1. $\(4\pi r^2\)$
  2. $\(2\pi r^2\)$
  3. $\(8\pi r^2\)$
  4. $\(3\pi r^2\)$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Original sphere surface area is 4 pi r^2. Dividing into 4 identical quarter-spheres adds 4 new circular faces each of area pi r^2. Total: 4 pi r^2 + 4 pi r^2 = 8 pi r^2.

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