1. The problem statement, all variables and given/known d At what speed, the velocity head of water is equal to pressure head of 40 cm of Hg? (1) 10.32 m/s (2) 2.8 m/s (3) 5.6 m/s 2. Relevant equations v^2/2g = p/rho*g (velocity head= pressure head). 3. The attempt at a solution since pressure head is given as 40 cm/s, i did it like v^2 = 40*2*g which i got after taking square root and all as 28.8 cm/s. i couldn't find my answer matching with any of the given options how to do this?