A$.$ A vertical cylindrical tank having inside diameter $3\mathrm{.}5$ m is filled with acetic acid up to $6$ m of its height. Acetic acid is flowing through a pipe of $54$ mm inside diameter and $1$ m length, connected at the bottom of a tank. This pipe is extended vertically downward from the bottom of the tank. The roughness parameter of the pipe is $0\mathrm{.}0216$ mm $.$ The liquid is being discharged from the exit end of the pipe into a tankmaintaining atmospheric pressure. Calculate the flow rate of acetic acid in $\frac{m^3}{h}$ and its average velocity flowing through the pipe. What will be flow rate of acetic acid in $\frac{m^3}{h}$ if the pipe is disconnected from the tank resulting in a hole of diameter $54$ mm at the bottom of the tank?