Determine the length of a horizontal pipe with diameter of 12.5cm and roughness of =0.05mm carrying oil and natural gas with an inlet pressure of 5MPa and temperature of 350K such that the pressure drop is 90kPa using homogenous method at no slip conditions. Mass flow rate of oil is reported as 0.7xkg/s and that of natural gas as 1.4kg/s. Consider the viscosity of oil and natural gas as 0.0029Pa.s and 0.00003Pa.s, respectively. Take the molecular weight of natural gas as 16g/mol and the density of the oil as 850kg/m3