The perimeter of an isosceles triangle is $56 \mathrm{cm}$. If the unequal side is $16 \mathrm{cm}$ long, find the length of the equal sides.

The length of a rectangle is $\frac{5}{4}\mathrm{th}$ of its breadth. If its perimeter is $81 \mathrm{m}$ and its area is $k {\mathrm{m}}^2$, then find the value of $k$.

Shruthi has cut a rectangular sheet of paper of dimensions $32 \mathrm{cm}\times 26 \mathrm{cm}$ shown in the figure. If the area of the design is $k {\mathrm{cm}}^2$, then find the value of $k$.