when pressure increases velocity also increases.Then how is it possible the above relation?

Force=mass*accelaration ________ 1

Accelaration=velcoity/time _______2

from above two equations  force=mass*velocity/time ______3

pressure=force/area ______4

from equations 3 and 4 we get pressure=mass*velocity/time*area 

so when the mass and area are constant the pressure is directly proptional to velocity 

we know that P=F/A

BUT F=ma

& a=dv/dt

so, F=mdv/dt

P=mdv/Adt

so, if mass and area are constant then P IS DIRECTLY PROPORTIONAL TO VELOCITY