digitalkicker digitalkicker

01-11-2018
Mathematics

contestada

Three ventilation fans, each working alone, can clear the smoke out of a room in 12 hours, 16 hours, and 24 hours respectively. How long would it take to clear out the smoke in the room if all three fans are used?

Respuesta :

tony1747 tony1747

01-11-2018

(use at own risk) either 16 17 or 17.3 hours

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