You are a meteorologist studying the weather. You need to calculate the speed of a tornado that has a diameter of 200 meters and a time of travel of 30 seconds. What is the speed of the tornado? If the tornado is moving at this speed towards a building that is 100 meters away, how long will it take for the tornado to reach the building? (Units: speed - meters per second (m/s), diameter - meters (m), time - seconds (s), distance - meters (m))
