I believe that T=PV-M. P is density of fluid surrounding the object, v is volume of object and M is the mass of object. So i have this object which is able to float due to air trapped inside it. This object is able to carry an extra load of 10 kg. So my formula would be, T= [p*(vol of object + vol of air + vol of load)]-(mass of object + mass of load+mass of air), Am i right? However, my lecturer taught us that 1Kcm^3 of air would be able to float up/lift up a mass of 1kg. I find that this idea contradicts with the formula given. So u guys have any idea on who is right?