keizhacarbajal3533 keizhacarbajal3533
  • 25-01-2021
  • Mathematics
contestada

Sam and his friend are working at the body shop. Sam can do the work in 7hours. When his friend is helping him they do the same work in 4 hours. How long does it take Sam's friend to do this work alone?

Respuesta :

liodakism26 liodakism26
  • 26-01-2021

Answer:

28/3

Step-by-step explanation:

because 1/7+x=1/4

x=3/28

recipricol of 3/28=28/3

28/3

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