A fluid is flowing through a horizontal pipe of varying cross-section, with speed v ms^-1 at a point where the pressure is P Pascal. At another point…

A fluid is flowing through a horizontal pipe of varying cross-section, with speed $\displaystyle v \mathrm{~ms}^{-1}$ at a point where the pressure is P Pascal . At another point where pressure is $\displaystyle \frac{P}{2}$ Pascal its speed is $\displaystyle \mathrm{V} \mathrm{ms}^{-1}$. If the density of the fluid is $\displaystyle \rho \mathrm{kg} \mathrm{m}^{-3}$ and the flow is streamline, then V is equal to :