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Mathematics, 28.10.2020 01:50 rniadsharri16

Después de una inundación, el departamento de bomberos de una ciudad utiliza tres bombas para drenar agua de los sótanos inundados. Las tres bombas pueden drenar toda el agua de un sótano inundado en 6horas, 5 horas y 4 horas respectivamente. Si las encienden simultáneamente ¿en cuánto tiempo logran vaciar el sótano?

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