a telegraphic wire suspended between two poles of height 15mt is in the shape of a parabola.the distance between the poles is 20mt and maximum sag of the cable wire is 4mt.then the height of cable at a distance of 5mt from one end is________?
a telegraphic wire suspended between two poles of height 15mt is in the shape of a parabola.the distance between the poles is 20mt and maximum sag of the cable wire is 4mt.then the height of cable at a distance of 5mt from one end is________?