Magnetism and Matter

At a place where the magnitude of the earth's magnetic field is 4×10−5T, a short bar magnet is placed with its axis perpendicular to the earth's magnetic field direction. If the resultant magnetic field at a point at a distance of 40‌cm from the centre of the magnet on the normal bisector of the magnet is inclined at 45∘ with the earth's field, then the magnetic moment of the magnet is