Salma goes for walk around a square park of sides $45 \mathrm{m}$ long. Roughly how many rounds must she complete walking around the park to cover $1 \mathrm{km}$?

Rashmi drew a triangle on a grid sheet, as shown below.  The area of each small square in the grid sheet is $1 {\mathrm{cm}}^2$. 

What is the area of the triangle (approximately)?

Archana drew a rectangle of length is $40 \mathrm{cm}$ on a grid paper and noted its area. She then reduced the width by $5 \mathrm{cm}$. 

What is the reduction in the area?

Mukul took a square grid and shaded grids to get the shape of letter $\mathrm{T}$.  Its area is $72 {\mathrm{cm}}^2$.

The perimeter of the shape shaded region is _____ $\mathrm{cm}$.

Javed drew a rectangle and shaded a part of it as shown below.

The area of the shaded region is _____ ${\mathrm{cm}}^2$

The cost of paving tiles in a room is $₹2160$. The cost of paving the tiles per square metre is $₹45$.  The length of the room is $8 \mathrm{m}$.

The breadth of the room is _____ $\mathrm{m}$.

Meera put a border around her rectangular bedsheet of length $2 \mathrm{m}$ and breadth $1 \mathrm{m} 60 \mathrm{cm}$. The cost border is $₹100$ per metre.

The total cost of border required is $₹$_____

A rectangular piece of land of dimensions $40 \mathrm{m} \times 60 \mathrm{m}$ is to be fenced $3$ rows of wire. 

What is the length of wire needed?

Raj has a square board of sides $10 \mathrm{cm}$. He removed two rectangular pieces from both sides, leaving a $2 \mathrm{cm}$ strip in the middle, to get the shape shown below.

The perimeter of the above shape is _____ $\mathrm{cm}$.