$21-$A pipe $50cm$ in diameter carries water $(10C)$ at a rate of $0\mathrm{.}5m\frac{3}{s}.$ A pump in the pipe is used to move the water from an elevation of $30m$ to $40m.$ The pressure at section $1$ is $70$kPa gage, and the pressure at section $2$ is $350$kPa gage. What power in kilowatts and in horsepower must be supplied to the flow by the pump? Assume $hL=3m$ of water and $1=2=1.$