This video lecture from Fluid Dynamics (F.Sc. first year physics) covers Equation of Continuity by using the relation of Speed and Cross Sectional area of the body through which fluid flows. It also explains how the speed of fluids can be controlled by changing area. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.