AP EAMCET Medical 2018 Shift 2 Paper

A telephone cable at a place has 5 long straight horizontal wires each carrying a current of 1.4 A from east to west. The angle of dip at the place is 60° and magnetic declination is zero. The resultant magnetic field at a point 3.5 cm below the cableis________T.
(Earth's magnetic field at the place = 0.4 G)