A hall is $12 \mathrm{m}$ long and $9 \mathrm{m}$ wide. Its floor is to be covered by rectangular tiles, each measuring $36 \mathrm{cm}$ by $20 \mathrm{cm}$. Calculate the number of titles required

Find the perimeter of the following:

Equilateral triangle with side $12.5 \mathrm{cm}$

Find the perimeter of the following:

Pentagon with side $5.75 \mathrm{cm}$

Find the perimeter of the following:

Octagon with side $6.25 \mathrm{cm}$

A rectangular garden is $50 \mathrm{m}$ long and $35 \mathrm{m}$ wide. It has a square rose garden of side $4 \mathrm{m}$. It has some play area for children which is $16 \mathrm{m}$ long and $10 \mathrm{m}$ wide. In the remaining area lawn is grown. Calculate the play area

A rectangular garden is $50 \mathrm{m}$ long and $35 \mathrm{m}$ wide. It has a square rose garden of side $4 \mathrm{m}$. It has some play area for children which is $16 \mathrm{m}$ long and $10 \mathrm{m}$ wide. In the remaining area lawn is grown. Calculate the area covered by lawn

A rectangular garden is $50 \mathrm{m}$ long and $35 \mathrm{m}$ wide. It has a square rose garden of side $4 \mathrm{m}$. It has some play area for children which is $16 \mathrm{m}$ long and $10 \mathrm{m}$ wide. In the remaining area lawn is grown. Calculate cost of putting a fence around the garden at $₹12 \mathrm{per} \mathrm{m}$.