Water flow 2

How many litres of water will flow in 7 minutes from a cylindrical pipe 1 cm in diameter, if the water flows at a speed of 30 km per hour

Correct result:

V =  274.8894 l

Solution:

t=7 60=420 s D=1/10=110=0.1 dm v=30/3.6 10=250383.3333 dm/s  s=v t=83.3333 420=35000 dm r=D/2=0.1/2=120=0.05 dm S=π r2=3.1416 0.0520.0079 dm2  1 dm3=1 l V=s S=35000 0.0079=274.8894 l



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