A tank has the shape of an inverted right circular cone with a radius of 5 metres and a height of 16 metres. Water is leaking from the tank at a rate of 2m³hour. At what rate is the radius of the top of the water decreasing when the depth of the water is 6 metres? Evaluate your answer to 4 decimal places. Select one: O 0.0849 m hour1 0.0265 m hour1 0.0566 m hour O 0.0055 m hour1