Five tractors

Five tractors plow field in 4.8 hours. How long plow this field if after 1.5 hours of work two tractors went to a different field?

Result

x =  7 h

Solution: 1.5*5/(4.8*5) + (x-1.5)*3/(4.8*5)=1

0.125x = 0.875

x = 7

Calculated by our simple equation calculator.

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