Workers 2

Worker dug the trench for 7 hours, another worker for 10 hours. They recruited to work even one worker more. Digging should be done for 2 hours. For how long would dig third worker alone?

Result

x =  3.889 h

Solution:


x/2-x/7-x/10 = 1

18x = 70

x = 359 ≈ 3.888889

Calculated by our simple equation calculator.

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To solve this example are needed these knowledge from mathematics:

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