If you look closely, there is no beach.
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I would think it would be closer to 12-15 seconds, however it depends on many factors. The size and structure of the human matters a lot when considering the speed at which they roll.
I just don't think this person is considering these things. Are they even serious about this sale?
You're assuming that you're falling down the stairs, and not just free falling over the ledge.
Oh no I'm considering the side, however we also need to consider that it is not going to be entirely smooth, there will be small bumps to provide some short-lived aerial velocity, however there may also be angled protrusions causing a directional drift to slow the person down further.
The way the person initially falls could also contribute, whether they're upright, trying to land on their feet at first, or simple falling to the side, or backwards, etc.
As the bones break they can break in positions which could affect the direction they continue to roll, if they hit the angled protrusions mentioned earlier, and possibly even latch for a moment.
If they're going at a slow speed, perhaps they can make a guess towards a small bump to increase the time spent airborne? This may speed things up but the air friction may play a role in how long the person stays up there (large or slim).
I'm thinking about this a bit too much.
30 minutes to get back.

This has nothing on Kelingking Beach in Indonesia. Gorgeous place but the hike down to beach is insane.
The house certainly isn't 5 minutes from the beach, the beach might be 5 minutes from the house though.
Since you're going to eat like you're on vacation, you need to exercise to match.
Imagine sliding down that rail.
Say bye bye to your perineum.
If you ignore air resistance, that's about 320 meters, from s=at^2^/2, a=g=10, t=8
You're not falling straight down though.
Don't tell me what I can't do
These stairs look so steep I deem it a good enough approximation, given I've already rounded g to 10
If you rounded g down you might have been closer with the fact they are stairs.
Are we assuming repeatedly hitting the stairs?
I've always considered vertical and horizontal movement separately, so I thought I'd have to add even more to the approximated traveled road, not decrease it.
Let us approximate stairs with a regular slope. Assume rolling down the stairs with minimal aditional horizontal movement other than the slope itself.
I've actually been to this exact location before to visit a family member.
Who's going to geolocate this?
You bet I am engineering some type of sled with a breaking system that (hopefully) won't kill me.
That is so nice while going down, and such a horror when having to go back up
A staircase like that is a PITA, not an addition to a home
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