Question

Find the breadth and area if the perimeter of a rectangle is 400m and its length is 140m?

Answer 1

Answer :

breadth=60m , area=8400m^2

Step-by-step explanation:

Length = 140 m

breadth =?

Perimeter = 400 m

Area = ?

perimeter=2*(l+b)

400=2*(140+b)

400=280+2b

400-280=2b

120/2=b

b=60m

Hence, area = l*b

=140*60

=8400m^2

Answer 2

Given:

Perimeter = 400 m.

Length = 140 m.

To find:

• Breadth of the rectangle.
• area of the rectangle.

Solution:

We know that,

Perimeter = 2(Length+Breadth)

⇒ 400 = 2(140+Breadth)

⇒ 2(140+Breadth) = 400

⇒(140+Breadth)=(400÷2)

⇒(140+Breadth) = 200

⇒ Breadth = (200-140)

⇒ Breadth = 60 m.

∴ The breadth of the rectangle is 60 m.

From the formula we get that,

Area = (Length × breadth)

        =(140×60) m²

       = 8400 m².

∴ The area of the rectangle is 8400 m².

Answer:

• The breadth of the rectangle is 60 m.
• The area of the rectangle is 8400 m².