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Question:

A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine is needed to fill this capsule?

Solution:

Given: Radius = 3.5/2 = 1.75
→ Volume = (4/3) × π × (r)³
→ Volume = (4/3) × 22/7 × (1.75)³ = 22.46 mm³