Multiple choice

What is the number of wax balls,each of radius 1 cm, that can be molded out of a sphere of radius 8 cm.?

  1. 256

  2. 512

  3. 768

  4. 1024
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volume of large sphere = (4/3)π(8)³ = (4/3)π × 512. Volume of each small ball = (4/3)π(1)³ = (4/3)π. Number of balls = (4/3)π × 512 / ((4/3)π) = 512. Option A (256) would give radius ≈ 6.3, C (768) requires larger sphere, D (1024) needs radius ≈ 10.

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