The diagonals of a rhombus are $32 \mathrm{cm}$  and $24 \mathrm{cm}$. Find the perimeter.

The base of a parallelogram is $21 \mathrm{cm}$ and the corresponding height is $16 \mathrm{cm}$. A rhombus has the same area as the parallelogram. If one diagonal of the rhombus is $48 \mathrm{cm}$ find other diagonal.

The base of a parallelogram is $21 \mathrm{cm}$ and the corresponding height is $16 \mathrm{cm}$. A rhombus has the same area as the parallelogram. If one diagonal of the rhombus is $48 \mathrm{cm}$ find perimeter of the rhombus.

If the area of trapezium $\mathrm{ABCD}$ in which $\mathrm{AD}\parallel \mathrm{BC}$, $\mathrm{AD}=30 \mathrm{cm}, \mathrm{BC}=50 \mathrm{cm}$ and altitude $\mathrm{AE}=36 \mathrm{cm}$ is $k {\mathrm{cm}}^2$.

Then find the value of $k$.

Then find the value of $k$.

Then find the value of $k$.