A horizontal pipeline carries water in streamline flow. At a point where the cross-sectional area is $10 {\mathrm{cm}}^2$ the water velocity is $1 \mathrm{m} {\mathrm{s}}^{-1}$ and pressure is $2000 \mathrm{Pa}$. The pressure of water at another point where the cross-sectional area is $5 {\mathrm{cm}}^2$, is