if the treadmill is equaling the speed of the wheels, then it would be.
think about it in small scale, your on a skateboard on a treamill, the treadmill speed = wheel speed, so you are standing still, and if i pull myself forward, then that means that the wheels are spinning faster then the conveyor is moving, this is what is needed for the plane to take off. the wheels NEED to spin faster then the treadmill, period. If the treadmill and wheels are going the same speed, as a person is holding onto the handle on the treadmill, then the plane isnt moving.
The question inadvertently states that the plane is not moving forward by saying that wheel speed is equal to conveyor belt speed. Its a trick physics question