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The worker completes the work in 12 days, the second in 10 days. The first worker kicks himself for four days, then the second worker comes. How long will it take to dig?

Correct answer:

t =  7.6364 d

Step-by-step explanation:


11t = 84

t = 84/11 = 7.63636364

t = 84/11 ≈ 7.636364

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