A 2-wire d.c distributor cable AB is 2 km long and supplies loads of 100A, 150A, 200A, and 50A situated 500 m, 1000 m, 1600 m, and 2000 m from the feeding point A. Each conductor has a resistance of 0.01 Ω per 1000 m. Calculate the p.d. at each load point if a p.d. of 300 V is maintained at point A.