Question

1.The area of a rectangle is 720 cm2.And it's breadth is 45cm.find it's length and perimeter.name the diffrent angles in the figure. ​

Answer 1

Question :

(1) The area of a rectangle is 720 cm². And it's breadth is 45cm. Find it's length and perimeter.

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Before, finding the answer. Let's find out on how we can find the answer.

• To find the Length of the Rectangle, we must use the formula of :

$\sf Length = \dfrac{Area}{Breadth}$

where, we have to divide the area by the breadth to find the length

• And to Find the Perimeter, we must use the formula of :

$\boxed{\sf Perimeter \: of \: Rectangle = (2 \times l) + (2 \times b)}$

Given :

• Area = 720 cm²
• Breadth = 45 cm

To find :

• Length
• Perimeter

Solution :

Area of Rectangle = l × b

Length = $\sf \dfrac{Area}{Breadth}$

            = $\sf \dfrac{720}{45}$

            = 16 cm

∴ Length is 16 cm.

Perimeter of Rectangle = (2 × l) + (2 × b)

                                       = (2 × 16) + (2 × 45)

                                       = 32 + 90

                                       = 122 cm

(2) Name the different angles in the figure. ​

• ∠EOD
• ∠DOC
• ∠COB
• ∠BOA

Answer 2

Step-by-step explanation:

(1)

Area of Rectangle = l × b

Length = {Area}/ {Breadth}

= 16 cm

∴ Length is 16 cm.

Perimeter of Rectangle = (2 × l) + (2 × b)

= (2 × 16) + (2 × 45)

= 32 + 90

= 122 cm

(2) Name the different angles in the figure.

∠EOD

∠DOC

∠COB

∠BOA