The excavator dug 40% of the excavation in 2 hours and 20 minutes. How long does it take him to dig the whole ditch?


t = 5:50 hh:mm Wrong answer

Step-by-step explanation:

2+20/60 = 0.40·t

24t = 140

t = 140/24 = 5.83333333

t = 35/6 ≈ 5.833333

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