A rectangular plot $20 \mathrm{m}$ long and $14 \mathrm{m}$ wide is to be covered with grass leaving $2 \mathrm{m}$ all around. If the area to be laid with grass is $k {\mathrm{m}}^2$.

Then find the value of $k$.

In the adjoining figure, point $\mathrm{A}$ , $\mathrm{B}$  and $\mathrm{C}$ are centres of arcs of circles of radius $5 \mathrm{cm}, 3 \mathrm{cm}$ and $2 \mathrm{cm}$ respectively. Find the perimeter and the area of the shaded region.

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