What do you think about this mathematical problem described (details inside)?

Problem and Question: 2 buildings are 50 meters apart. 60 if jumping across. There’s a 20 meter height difference with the other building. On Earth, an object can move horizontally at one speed, but due to gravity, it will increase vertical velocity at a specific rate. Now, what’s the equation for a 20-meter fall?
Answer: T equals the square root of 2s over g, T being the time, g the acceleration due to gravity, or 9,80665 m/s per second, and s the distance fallen: 20 metres. Plug these numbers in, and you get 2.02 seconds. In other words, it would take about 2 seconds to jump 20 metres.
Question: Is it possile?
Answer: We have to travel 60 meters in 2 seconds. Meaning 30 metres in 1 second, or 108 kilometers per hour. So, by foot, impossible, obviously. :-)
By car, with an optimal room’s size, possile, probably. :-)