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Vinil7 [7]
2 years ago
10

If Marie were to paint her living room alone, it would take 7 hours. Her sister Barbara could do the job in 8 hours. How many ho

urs would it take them working together? Express your answer as a fraction reduced to lowest terms, if needed.
Mathematics
1 answer:
Zielflug [23.3K]2 years ago
4 0

Answer:

\sf\longmapsto \:  3.73 hours

Step-by-step explanation:

\sf\longmapsto \:  \frac{1}{7 } +  \frac{1}{8}

\sf\longmapsto \:  \frac{15}{56}

Now, Reciprocal–

\sf\longmapsto \:  \frac{56}{15}

\sf\longmapsto \:  3.73 hours

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