The field

Three tractors plow the field in 6 hours. However, after 2 hours, one tractor broke down. How long will the field be plowed?

Correct answer:

t =  8 h

Step-by-step explanation:


3·6 = 3·2 + (3-1)·(t-2)

2t = 16


t = 16/2 = 8

t = 8

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