Methane density is 0.656 kg/m^3. Air density is 1.225 kg/m^3. So a balloon of 1 cubic meter will lift 0.569 kg. A man weighing 58 kg would need a balloon of 120 cubic meters.
Ok, so possibly not but in regard to my little story I don`t think the readers would have your sort of knowledge so I think I`ll get away with it. Thanks, really appreciate your time..
Ok, so possibly not but in regard to my little story I don`t think the readers would have your sort of knowledge so I think I`ll get away with it. Thanks, really appreciate your time..