Given this paragraph about skydiving, give me the average time skydiver spends in freefall.

Context: Skydiving includes free falling through the air prior to opening a parachute. Typically skydives are carried out from around 4,000m offering 40 to 50 seconds of freefall time. Longer free fall times can be achieved by exiting an aircraft at altitudes much higher than 4,000m, but very high jumps require pressurized air within the aircraft, and bottled oxygen for the diver.

Answer: Typically skydives are carried out from around 4,000m (or 12,500ft) offering 40 to 50 seconds of freefall time.