The sides of a nuclear power plant cooling tower form a hyperbola. The diameter of the bottom of the tower is 262 feet. The smallest diameter of the tower is 132 which is 420 feet above the ground. The tower is 544 feet tall. 544 ft 132 ft 420 ft 262 ft Photo remixed from work by Jiří Sedláček I, CC-BY-SA Find the width of the tower at a height of 22 feet, to 1 decimal place. Submit Question feet.