Water tank

The water tank has a cylindrical shape with a base diameter of 4.2 m and is 80 cm deep. How many minutes will take fill it 10 cm below the edge of the tank if water flowing 2 liters per second?

Correct answer:

t =  80.8175 min

Step-by-step explanation:

D=42 dm h=(8010)/10=7 dm r=D/2=42/2=21 dm V=π r2 h=3.1416 212 79698.0965 dm3 v=2 60=120 l/min t=V/v=9698.0965/120=80.8175 min

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