Coffee filters behave like small parachutes, with a drag force that is proportional to the velocity squared, Fdrag = Kv^2. A single coffee filter, when dropped from a height of 1.61 m, reaches the ground in a time of 2.61 s. When a second coffee filter is nestled within the first, the drag force remains the same, but the weight is doubled. Find the time for the combined 2 filters to reach the ground. (Neglect the brief period when the filters are accelerating up to their terminal speed.)