2-wire d.c. distributor, 500 m long is fed at one of its ends. The
cross-sectional area of each conductor is 34 cm^2 and the
resistivity of copper is 1.7x10^-6 Ohm cm. The distributor supplies
200 A at a distance of 300m from the feeding point and 100 A at the
terminus. Calculate the voltage at the feeding end if the voltage
at the terminus is to be 230 V.