Cleaning 3434

During spring cleaning, the removal of scrap iron by truck would take 15 hours. With one tractor, it would take three times as long. In how many hours will the scrap iron be removed if the removal is carried out by a truck and two equally powerful tractors at the same time?

Correct answer:

t =  9 h

Step-by-step explanation:


(1/15+2/(15·3))t = 1

(1/15+2/(15·3))·t = 1

1.666667t = 15


t = 15/1.66666667 = 9

t = 9

Our simple equation calculator calculates it.



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