Question

the perimeter of a floor a room is 18 m what is the area of four wall of the room if it height is 3cm​

Answer 1

$\sf{\huge{\underline{\pink{Given :-}}}}$

• The perimeter of a floor a room is 18 m.

• The height of the room is 3cm .

$\sf{\huge{\underline{\orange{To\:Find :-}}}}$

• The area of four wall of the room.

$\sf{\huge{\underline{\red{Solution :-}}}}$

Let the length be x

& the breadth be y

The height of the room is 3cm .

We know ,

Perimeter of the rectangle is 2(l+w)

➝ 2 ( l + b ) = 18

➝ l + b = 18/2

➝ l + b = 9 ------(1)

The area of four wall of the room = CSA of cuboid

➝ 2 (l + b ) × h

From 1 & given, h = 3cm .

➝ 2 ( 9 ) × 3

➝ 18 × 3

➝ 24 cm²

______________________________________

Answer 2

Answer: 24 $cm^{2}$

Step-by-step explanation:

    The perimeter of a floor a room is 18 m.

   The height of the room is 3cm .

   The area of four wall of the room.

Let the length be x

& the breadth be y

The height of the room is 3cm .

We know ,

Perimeter of the rectangle is 2(l+w)

➝ 2 ( l + b ) = 18

➝ l + b = 18/2

➝ l + b = 9 ------(1)

The area of four wall of the room 2 x l+b x h

➝ 2 (l + b ) × h

From 1 & given, h = 3cm .

➝ 2 ( 9 ) × 3

➝ 18 × 3

➝ 24 cm²

___________________________________________________