‘Sky Whale’ is a plane with four engines that can carries over 700 people. The airplane will exist for short distances between cities. The technology will use eco-engines with energy recovery systems which are able to feed back to the planes themselves. With a capacity to transport a large number of passengers, like a train of high speed, ‘Sky Whale’ will be a safer type of planes for the future. We will also have supersonic planes which are transcontinental or transoceanic. They can fly at very high altitudes more than 30,000 metres and at record speeds. The engines which can change according to the situations are called intelligent engines. 1. How many people can Sky Whale carry? ____________________________ 2. What is the altitude of the flight? ____________________________ 3. Why are the engines of Sky Whale called intelligent ones? _____________________________