A triangle and a parallelogram have the same base and the same area. If the sides of the triangle are $26 \mathrm{c}\mathrm{m}, 28 \mathrm{c}\mathrm{m}$ and $30 \mathrm{c}\mathrm{m}$, and the parallelogram stands on the base $28 \mathrm{c}\mathrm{m}$, then find the height of the parallelogram.

The triangular side walls of a flyover have been used for advertisements. The sides of the walls are $122 \mathrm{m},22 \mathrm{m}$ and $120 \mathrm{m}$. The advertisements yield an earning of $\mathrm{₹}\mathrm{}5000$ per ${\mathrm{m}}^2$ per year. A company hired one of its walls for $3$ months. How much rent did it pay?