\textbf{192.} A water pump transfers $3$ cubic meters of river water per minute to points whose height above the river water surface is $24$ meters. If the input power of the pump is $20$ kilowatts, what is the efficiency of the pump in percent?
$$\left(g = 10\,\frac{\text{m}}{\text{s}^2},\quad \rho_{\text{water}} = 1\,\frac{\text{g}}{\text{cm}^3}\right)$$
\begin{itemize}
\item[(1)] $70$
\item[(2)] $60$
\item[(3)] $40$
\item[(4)] $30$
\end{itemize}
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