Volumul bazinului = V bazin = L*l*h = 50*30*3=4500m3=4500*1000L=4500000L
debit 10 robinete = 200L/min
1min.................200L
xmin...........4500000L
x=4500000/200=45000/2=22500minute
1h..........60minute
y h......22500minute
y=22500/60=2250/6=375h