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Find the perimeter of the following shape.

Which of the following figures has the maximum perimeter?

There is a rectangle of length $22 cm$. Find its area if its perimeter is $75 cm$.

The perimeter of a square is $54 cm$. Find the area of the square.

Square sheets each of length $25 cm$, have to be cut from the given rectangular sheet of metal. Find out the maximum number of square sheets that can be cut from it.

The length and breadth of a room are $15 \mathrm{feet}\times 12 \mathrm{feet}$. The floor of the room has to be laid with tiles of dimensions $1 \mathrm{feet}\times \frac{1}{2} \mathrm{feet}$. If one box contains $40$ tiles, how many such boxes of tiles will be required to pave the floor of the room?

The length and the breadth of a hall are $20 m$ and $15 m$. Find the area of the four walls of the hall if the height of the hall is $10 m$

Find the area of the shape shown below.