Question

The area of a rectangle is 84cm² and its breadth is 12 cm. Find its length and perimeter.


Please tell the answer​

Answer 1

Answer:

l=7

perimeter=38

Step-by-step explanation:

we know area is 84cmsquare and it's breadth is 12 cm

area is length into breath

so length is area divided by breadth

which is 84÷12=7

length is 7cm

perimeter is (l+b)*2

which is (7+12)*2=38

so length is 7cm

and perimeter is 38cm

Answer 2

Given :

• The area of the rectangle = 84cm²
• The breadth of the rectangle = 12 cm

To find :

• its length and perimeter

Steps :

• To find the length, we have to divide the area with its breadth.
• To find the Perimeter, we have to use the Perimeter of the rectangle formula.

Solution :

⇒ Let's find the Length of the Rectangle.

Area of Rectangle = l × b

                         84 = l × 12

                  Length = 84/12

                               = 7 cm

• Therefore, the length of the rectangle is 12 cm.

⇒ Now, we have to find the Perimeter of the Rectangle.

Perimeter of the Rectangle = 2 (l + b)

                                             = 2 (7 + 12)

                                             = 2 (19)

                                             = 2 × 19

                                             = 38 cm

• Therefore, the perimeter of the Rectangle is 38 cm.