Abstract: We prove a version of Hardy's type inequality in a domain $\Omega\subset \mathbb R^n$ which involves the distance to the boundary and the volume of $\Omega$. In particular, we obtain a result which gives a positive answer to a question asked by H. Brezis and M. Marcus. The results are contained in a joint paper with M. Hoffmann-Ostenhof and T. Hoffmann-Ostenhof which appeared in Journal of Functional Analysis Vol. 189, No. 2, March 10, 2002