Question

The area of ​​a rectangular seat is 480 cm square. If its width is 12 cm, what will be the perimeter of the seat?​

Answer 1

Step-by-step explanation:

area of rectangle=l×b

480=12×l

480/12=l

40cm=l

perimeter of rectangle=2(l+b)

=2(40+12)

=2×52

=104cm

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Answer 2

Explanation :-

Given :

• Area of rectangular seat = 480 cm²
• Width of rectangular seat = 12 cm

To find :

• Perimeter of the rectangular seat

Solution :

Let the length be 'l' cm

We know that,

$\sf\implies Area \: = Length \times Breadth$

Putting the values,

$\sf\rightarrow 480 = L \times 12$

$\sf\rightarrow L = \dfrac{480}{12}$

$\sf\bold\therefore L \: = 40$

Hence, the length is 40 cm.

Now, we know that,

$\sf\implies Perimeter \: = 2(l + b)$

Putting the values,

$\sf\rightarrow 2 (12 + 40)$

$\sf\rightarrow 2 \times 52$

$\sf\bold\therefore 104$

Hence, the perimeter of the seat is 104 cm.