A pipe 1500 m long and 200 mm in diameter is laid at a slope of 1 in 200 for the first half length and a slope of 1 in 100 for the second half length . The pressure at the upper and lower ends are respectively 1 $$\frac{kg}{cm^{2}}$$ (98.1 $$\frac{kN}{m^{2}}$$) and 0.5 $$\frac{kg}{cm^{2}}$$ (49.05 \frac{kN}{m^{2}}). If the coefficient of friction f=0.04, the discharge in $$\frac{cum}{sec}$$ will be