Simultaneously 4746

One painter paints the school in 7 days, the other in 6 days. The school had to be painted in 2 days. A third painter was called in, and they all worked simultaneously. In how many days would this third painter paint the school by himself?

Correct answer:

t =  5.25 d

Step-by-step explanation:

2/t = 12/72/6 t=2/(12/72/6)=5.25 d

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