Respuesta :

1 year and 45 days & March 17, 1930

Answer:

410 days

Explanation:

The construction of the Empire State Building was completed on April 11, 1931 which was actually twelve days ahead of the desired schedule. The total time it took from the commencement of construction to it's completion was 410 days. Also, the Empire State Building was the world's tallest building until 1970 since its completion in 1931.