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A capsule is a cylinder with hemispherical ends. Volume = πr²h + (4/3)πr³ where h is the cylindrical height and r is the radius. Surface area = 2πrh + 4πr² (cylinder lateral + full sphere surface).

ステップバイステップガイド

1. 1Total length = h + 2r (cylindrical part plus two hemispheres)
2. 2Volume = π r²(h + 4r/3)
3. 3Surface area = 2πr(h + 2r)
4. 4A capsule with h=0 is just a sphere

解いた例