Ce rouleau de peinture a les dimensions suivantes : 18 cm de longueur et 5 cm de diamètre.
Calculer l'aire de la surface en cm², lorsque le rouleau a fait un tour.
Réponse : ......

By: USER2646
28 Agustus 2025 mathematiques 5 minutes
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Question

Grade: Education Subject: mathematiques
Ce rouleau de peinture a les dimensions suivantes : 18 cm de longueur et 5 cm de diamètre.
Calculer l'aire de la surface en cm², lorsque le rouleau a fait un tour.
Réponse : ......
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Answer (252)

Best Answer
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Périmètre du rouleau = Diamètre x 3,14 = 5 cm x 3,14 = 15,70.

Aire peinte = 1cm2 x 15,7 x 18 = 282,6 cm2 = 2,826 dm2

Voilà, j'espère t'avoir aidé(e)

Answered on 28 Agustus 2025

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