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AnnZ [28]
3 years ago
10

Un entrepreneur en construction vient d'embaucher deux équipes d'ouvriers. Nommons-les l'équipe A et l'équipe B.

Mathematics
1 answer:
Irina18 [472]3 years ago
6 0

Answer:

Le nombre de jours qu'il faudra à l'équipe A pour terminer le projet si elle travaillait seule est de 10 jours

Le nombre de jours qu'il faudra à l'équipe B pour terminer le projet si elle travaillait seule est de 15 jours

Step-by-step explanation:

Ici nous avons;

Temps pour l'équipe A et B pour terminer la tâche = 6 jours

L'équipe A + l'équipe B pour les deux premiers jours, il faudra 10 jours à l'équipe B pour terminer le travail

Que le projet soit P

Taux de travail de l'équipe A = W₁

Taux de travail de l'équipe B = W₂

∴ W₁ × 6 + W₂ × 6 = P ..................... (1)

W₁ × 2 + W₂ × 12 = P ....................... (2)

Par conséquent, W₁ = (P - 6 · W₂) / 6

En substituant la valeur de W₁ dans (2) nous avons

 Qui donne;

15 · W₂ = P

Par conséquent, il faudra 15 jours à l'équipe B pour terminer le projet si elle travaille seule et branche la valeur de l'équation (1), nous avons;

10 · W₁ = P

Par conséquent, il faudra 10 jours à l'équipe A pour terminer le projet si elle travaille seule.

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