The area of a square field is $9$ hectares. Find the cost of fencing it at the rate of $₹ 32 \mathrm{per} \mathrm{metre}$.

The length and breadth of a rectangular garden are $96 \mathrm{m}$ and $74 \mathrm{m}$ respectively. A path $4 \mathrm{m}$ wide is to be constructed outside and around the garden. Find the area of the path.

There is a grassbed of width $1 \mathrm{m}$ running around a square waterbed inside a park of side $50 \mathrm{m}$ as shown in the figure. Find the area of the grassbed.

There is a circular waterbed of radius 5 m inside the rectangular park of length 15 m and breadth 12 m as shown in the figure. Find the area of the park excluding the waterbed and also find the cost of fencing the waterbed at the rate of rs 60 per sq.m. (Take $\mathrm{\pi }=3.14$)