"US worker survives 47-storey fall"

Miraculous.

As a rough and ready calculation for how long he was in the air, divide height fallen (in metres) by five and then take the square root. This chap fell 150 metres ÷ 5 = 30, square root of which is 5.5.

To check this:
a) Acceleration due to gravity is 9.81 m/s2
b) If you fall for 5.5 seconds your terminal velocity (ignoring wind resistance) is 5.5 x 9.81 = 54 m/s,
c) So your average speed is half that = 27 m/s.
d) He fell 150 metres at an average speed of 27 m/s, 150 ÷ 27 = 5.5.