un spécialiste couvre un plancher de 36 mètres ×18 mètres avec des tuiles de vinyle en 9 heures Combien de temps lui faudra t-il pour couvrir un plancher de 28 mètres × 15 mètres​

By: USER1858
27 Agustus 2025 mathematiques 5 minutes
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Grade: Education Subject: mathematiques
un spécialiste couvre un plancher de 36 mètres ×18 mètres avec des tuiles de vinyle en 9 heures Combien de temps lui faudra t-il pour couvrir un plancher de 28 mètres × 15 mètres​
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un spécialiste couvre un plancher de 36 mètres ×18 mètres avec des tuiles de vinyle en 9 heures Combien de temps lui faudra t-il pour couvrir un plancher de 28 mètres × 15 mètres​

648 m²  ⇒ 9 h

420 m² ⇒ 420 x 9/648 = 5 h 50 min

Explications étape par étape :

Answered on 27 Agustus 2025

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