Woodcutter 39491

A bark beetle attacked part of the forest. The first woodcutter would need ten shifts to clear the forest, the second 6 shifts, and the third five shifts. Calculate how many shifts the forest will take if they work together.

Correct answer:

t =  3

Step-by-step explanation:

x (1/10+1/6+1/5)=1  14x=30  x=1430=2.14285714  x=7152.142857  t=x=2.1429=3

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