The suspension of an elevator consists of three equal steel cables of 1.25 cm in diameter each. When the floor of the elevator is at the level of the first floor, the length of the cables is 25 m. A weight of: 103kp is introduced into the elevator. How far below ground level will the elevator floor be? It is assumed that the descent is due exclusively to the elongation of the suspension cables, being Young's Module of the same: E=2.0∗106kp/cm2.