Paragraph 1
Supersonic passenger planes could be in the
this decade. Supersonic means
than the speed of sound, which is 1,234.8kph. United Airlines plans to buy 15 supersonic
from a company called Boom Supersonic. The planes will fly up to 88
, all in business
. The planes will have a top
of 2,099kph. Most modern airplanes have a
speed of around 1,000kph. The new planes will cut the
it takes to fly from London to New York. It will take
than four hours. It
takes around 7 1/2 hours.
