For the bent pipe shown in the figure, it is sought to replace the system of three forces with a single equivalent resultant force R. Find the distance d (in metres) from point O to the point on the x-axis through which the line of action of R passes. a = 380 N, b = 143 N b 0.25 m 50 N 0.25 m a 0.25 m 0.2 m