water from a treatment plant is pumped into distribution system at a rate of 4.38 m^3/sec, a pressure of 480 kpa and a temperature of 20 degree celcius. The pipe has a diameter of 750 mm and is made of ductile iron. Estimate the pressure 200m downstream of the treatment plant if the pipe remains horizontal. Use the moody diagram to determine the friction factor ( you can also use the Swaimee-Jane equation). After 20 years in operation, scale buildup is expected to cause the roughness of the pipe to increase by a factor of 10. What is the effect of this on water pressure 200 m downstream of the plant? Say, Water flows at a velocity of 2m/sec in a 300 mm new ductile iron pipe. Estimate the headloss over 500m