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Bonsoir,

Le volume d'un glaçon cubique de côté 3 cm est de 3x3=27 cm^3 , alors le volume de 5 glaçons sera: 135 cm^3 (27*5).
Ils ont perdu 11% de leur volume, c a r: 135 - (135 x 11/100) = 120,15 cm^3
Le rayon de verre est 4 (8/2)

Le volume d'eau dans le verre sera : h*π*r²  = 16πh.

On a déjà : 16πh = 120,15

donc : h = 120,15/(16π) ≈ 2,39 cm.


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