Area and Boundary

What is an area in measurement?

Population density can be found as

Population density of a particular area can be computed by

The area of the shape on graph paper is _____ $\mathrm{sq}.\mathrm{cm}.$ [Area of $1$ small square$=$$1 \mathrm{sq}.\mathrm{cm}.$]

Find the area (in $\mathrm{sq}.\mathrm{cm}.$) of the given shape on graph paper.

[Area of $1$ small square$=1 \mathrm{sq}.\mathrm{cm}.$]

The area of the rectangular blackboard is $30 \mathrm{sq}.\mathrm{cm}.$ [ Area of each small square$=1 \mathrm{sq}.\mathrm{cm}.$]

Calculate the area of the given shape

[Area of $1$ small square$=1 \mathrm{sq}.\mathrm{cm}.$]

The table shows the population and area of the United States of America in $2020$.Complete the table.(Round the answer the nearest unit place)

What is the percentage of population of Christianity in Andhra Pradesh? 

Perimeter of a square is $164 \mathrm{c}\mathrm{m}$. What is its length? _____ $\mathrm{cm}$.

Solve the puzzle by finding perimeters from the clues given in 'Down' and areas from the clues given in 'Across'.

Across

$1$. Rectangle of length $80$, units and breadth $40$ units.

$2$. Rectangle of length $45$, units and breadth $42$ units.

$3$.  Rectangle of length $32$, units and breadth $24$ units.

$4$. $64 \mathrm{sq}.$ units more than the square of side $50$ units.

$7$. $1 \mathrm{sq}.$ unit less than the square of side $5$ units.

Down

$5$. Square of side $7$ units.

$6$. $2$ units more than the square of side $20$ units.

$8$. Square of side $104$ units.

$9$. $8$  units more than the square of side $50$ units.

Perimeter of a square is $144 \mathrm{c}\mathrm{m}$. What is its length in centimetres?

What will be the perimeter of a square of side $16 \mathrm{cm}$?

Kuldeep tried many different ways to make a boundary for $800$ square metres of land.

He made rectangles $A, B$ and $C$ of different sizes.

But then Kuldeep made an even longer rectangle. So how longer!

So, Kuldeep get _____ metres of gold wire!!

Understand why the king fainted?

Now do you understand why the king fainted!!!

Kuldeep tried many different ways to make a boundary for $800$ square metres of land.

He made rectangles $A, B$ and $C$ of different sizes.

But then Kuldeep made an even longer rectangle. So how longer!

Now do you understand why the king fainted!!!

How much gold wire will Kuldeep get for rectangle $C(\mathrm{in} \mathrm{m})$?

Kuldeep tried many different ways to make a boundary for $800$ square metres of land.

He made rectangles $A, B$ and $C$ of different sizes.

But then Kuldeep made an even longer rectangle. So how longer!

Now do you understand why the king fainted!!!

How much gold wire will Kuldeep get for rectangle $B$$(\mathrm{in} \mathrm{m})$?

Kuldeep tried many different ways to make a boundary for $800$ square metres of land.

He made rectangles $A, B$ and $C$ of different sizes.

But then Kuldeep made an even longer rectangle. So how longer!

Now do you understand why the king fainted!!!

How much gold wire will Kuldeep get for rectangle $A$?

Who willl need the longest wire for fencing ?_____

If the population of West Bengal is $9,90,00,000$ and its area is $88,000 {\mathrm{km}}^2$. After some years, if the population will increased and become $9,90,88,000$ , then the new population density of West Bengal is _____ $\mathrm{pop}./{\mathrm{km}}^2$.

If the population of West Bengal will increase after some years and the area remains same. Then, The population density will also increase.