Going to be very busy this week with personal business, as such I won't as available as I normally would.
Try asking another calc group member for help if you need one.
Edit: I'm good now.
Try asking another calc group member for help if you need one.
Edit: I'm good now.
However Air Density varies the higher up you go. You can't just use the 1.225 density all around, and I'm not certain if that feat can even be calculated like that.
I cannot give you the answers to this though, best to bring it up with another calc group member. To try and find the actual weight and if that method is usable for this feat.