Complete 19783

Two roofers were to cover the roof in 14 days. After five days, they added one roofer. How long will it take them to complete the work? How many days will it take them to cover?

Correct answer:

t =  11 d

Step-by-step explanation:


2·14 = 2·5+(2+1)·(t-5)

3t = 33


t = 33/3 = 11

t = 11

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