The diagram below shows a floor plan of a school ground. Use the diagram to answer the questions that follow:

The length of the office is $6 \text{ m}$.
The breadth (height) of the office is the same as the height of the Strong Room, which is $3 \text{ m}$.

The perimeter of the office is $\boxed{\text{18 m}}$.

2.1.2

Length ($l$) = $6 \text{ m}$
Breadth ($b$) = $3 \text{ m}$

The area of the office is $\boxed{\text{18 m}^2}$.

2.2.1

The base of the playfield is $300 \text{ cm}$. Convert this to meters:

The height of the playfield is $4 \text{ m}$.

The area of the playfield is $\boxed{\text{6 m}^2}$.

2.2.2

Total area of playfield = $6 \text{ m}^2$
Area covered by one bag of sand = $1.6 \text{ m}^2$

They will need to buy $\boxed{\text{4 bags}}$.