The 747 airliner has a hump because….

The 747 airliner has a hump because Boeing was convinced that future supersonic aircraft would eventually make it obsolete as a passenger plane. The raised cockpit allowed for a hinged nose so the 747 could continue being marketable as a cargo carrier. Today, the 747 as a passenger plane is steadily replaced by twin-engine aircrafts as they are more efficient. However, fuel efficiency isn’t such a big concern for cargo and therefore, the 747 is very popular as a cargo plane.