Question

if the length of a rectangle is 29.8 mm and the area is 12.069 cm
square what is the perimeter of the rectangle ? ​

Answer 1

Answer:

40.5 mm

Step-by-step explanation:

Area= 12.069 cm²

= 1206.9 mm

Length= 29.8 mm

Breadth= Area/Length

= 1206.9/29.8 mm

= 40.5 mm

Answer 2

To find : perimeter of rectangle.

Given : length = $29.8 mm$ and area = $12.069 \ cm$

                        = $2.98 \ cm$

Solution :

• According to question we are given that length and area of rectangle are $2.98 \ cm$ and $12.069 \ cm$ respectively. We have to find perimeter of rectangle but firstly we need to find breadth of rectangle.

• To find area we use following formula -

       Area of rectangle $=l \times b$

• Substituting the values we get,

        $12.069 = 2.98 \times breadth \\breadth = \frac{12.069}{2.98} \\breadth = 4.05 \ cm$

• To find perimeter we use following formula :

          Perimeter = $2 ( l + b )$

                           $= 2 ( 2.98 + 4.05 ) \\= 2 \times 7.03 \\= 14.06 \ cm$

Hence , perimeter of rectangle is $14.06 \ cm$ .