1. The problem statement, all variables and given/known data Hi, A question on work done in inflating a square balloon. 2. Relevant equations Work done = integral of p*dv (see below). 3. The attempt at a solution I just wanted some pointers on the following. Work done = integral of p*dv. But I don't know if p0 would be taken into account, and if so, how that would be incorporated into the equation? My second question is that, how would the calculation differ between (a) and (b)? Thanks.