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Multiple choice

Find the volume of a sphere of radius $2.1\;cm$.

  1. $34.8\;cm^3$
  2. $35.8\;cm^3$
  3. $38.8\;cm^3$
  4. $36.8\;cm^3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The volume of a sphere is (4/3) * pi * r^3. With r = 2.1, V = (4/3) * 3.14159 * (2.1)^3 = (4/3) * 3.14159 * 9.261 = 38.792 cm^3, which rounds to 38.8 cm^3.

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