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  • 14-06-2022
  • Mathematics
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A girl can do her homework in 1.5 hours. How long would It take her twin brother to do the same homework alone if together they do it in 40 minutes?

Respuesta :

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  • 14-06-2022

Answer:

72 minutes

Step-by-step explanation:

in minutes,

1/90 + 1/x = 1/40

x = 72

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