context: The height of the waterfalls is 53 meters. The foot of the American Falls obscures the pile of stones, which is why its apparent height is only 21 meters. The width of the American Falls is 323 meters, the Horseshoe Falls is 792 meters. The volume of falling water reaches 5700 and more m³ / s [1].
question: What is the height of Niagara Falls?
answers.text: 53 meters