A rectangular conducting loop of total resistance 1.5Ω has a height of 6.0cm. It is being pulled horizontally out of a region containing a uniform 0.80T magnetic field that is perpendicular to the plane of the loop. When exactly 4.0cm of the loop’s length remains inside the field, the current measured in the loop is 25mA. Assuming the speed of the loop is constant, determine that speed.