Sick

Six seamstresses should make 60 shirts in five business days. After three days two seamstresses were sick. How many days have the remaining seamstresses to finish contract?

Result

t =  3

Solution:

$a=60/(5 \cdot \ 6)=2 \ \\ b=60 - 3 \cdot \ 6 \cdot \ a=60 - 3 \cdot \ 6 \cdot \ 2=24 \ \\ t=\dfrac{ b }{ a \cdot \ (6-2) }=\dfrac{ 24 }{ 2 \cdot \ (6-2) }=3$

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