magnetic field due to a finite straight conductor is given by

here since it forms an equilateral triangle so we will have

also the perpendicular distance of the point from the wire is

now from the above equation magnetic field due to one wire is given by



now since in equilateral triangle there are three such wires so net magnetic field will be

Answer:
40 meters. look for the dot above the 20 on the x-axis and follow it over to the left.
Explanation:
Jupiter i hope it is right answer