Water flows in a horizontal tube as shown in figure.The pressure of water changes by $600N/m^2$ between A and B where the areas of cross section are $30cm^2$ and $15cm^2$ respectively.Find the rate of flow of water through the tube

Question

$\begin{array}{1 1}(A)\;1880cm^3s^{-1}\\(B)\;1890cm^3s^{-1}\\(C)\;2200cm^3s^{-1}\\(D)\;2300cm^3s^{-1}\end{array}$