A venturimeter as shown in the figure (not to scale) is connected to measure the flow of water in a vertical pipe of $\text{20 cm}$ diameter.

Assume $g=9.8\text{ m/s}^{2}$. When the deflection in the mercury manometer is $\text{15 cm}$, the flow rate (in $\text{lps}$, round off to two decimal places) considering no loss in the venturimeter is ______________________