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xeze [42]
4 years ago
14

El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañ

era rosabel, le toma 9 horas en realizar la misma tarea. Si ambas trabajan juntas para hacer todo el trabajo d ela oficina,
a. Cuánto tiempo le tomará a ambas realizar el trabajo?
Mathematics
1 answer:
Alex_Xolod [135]4 years ago
5 0

Answer:

El tiempo que tardarán Lourdes y Rosabel en hacer el trabajo juntas es de 3,6 horas.

Step-by-step explanation:

Los parámetros dados son;

El tiempo que tarda Lourdes en leer las letras = 6 horas

El tiempo que le toma a Rosabel leer las letras = 9 horas

Sea la cantidad total de trabajo de oficina = X

Deje que el tiempo que ambos tienen que trabajar para hacer el trabajo = t

Por lo tanto;

La tasa de trabajo de Lourdes = X / 6

La tasa de trabajo de Rosabel = X / 9

X / 6 × t + X / 9 × t = X

t × (1/6 + 1/9) = 1

t × 5/18 = 1

t = 18/5 = 3,6 horas

Por lo tanto;

El tiempo que les llevará a Lourdes y Rosabel hacer el trabajo juntas = 3.6 horas.

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