The Avro Arrow, a Canadian supersonic interceptor aircraft, was developed over a period of about five years. The project officially began in 1953, with the first prototype, the CF-105 Arrow, making its maiden flight on March 25, 1958. However, the program faced challenges, and despite its advanced design and capabilities, it was controversially canceled in 1959, just a year after the first flight.
a long time
it take 2 days
It took 273 days for them to build the pyramid
It takes a long time...
it took 27years to build interstate 75.
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1 second
Several Weeks
hs2 will take 15 years to build
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it took 3 years
How long did it take to build st James cathedral london
a long time
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