Bonjour,
Asurface = 2πrh +2πr²
A = 2π * 8 * 11 + 2π * 8²
A = 16π * 11 + 2π * 64
A = 176π + 128π
A = 304π
A ≈ 955cm²
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Bonjour,
Asurface = 2πrh +2πr²
A = 2π * 8 * 11 + 2π * 8²
A = 16π * 11 + 2π * 64
A = 176π + 128π
A = 304π
A ≈ 955cm²