Question

THE PERIMETER OF A RECTANGLE IS 480 CM AND LENGTH IS 140 CM.FIND ITS AREA IN SQUARE METRES​

Answer 1

Question :

THE PERIMETER OF A RECTANGLE IS 480 CM AND LENGTH IS 140 CM.FIND ITS AREA IN SQUARE METRES

Answer :

$\sf\pink{given}$

• Perimeter of rectangle is 480 cm

• Length of the rectangle is 140 cm

$\sf\pink{to\:find}$

• Area of the square = ?

• first need to find the breadth

Explanation :

Perimeter = 2×( l + b )

➡️ 480 = 2 × ( 140 + b )

➡️ 480 = 280 + 2b

➡️ 480 - 280 = 2b

➡️ 200 = 2b

➡️ b = 200÷2

➡️ b = 100 cm .

Area = length × breadth

➡️ 100 × 140

➡️ 14000 cm²

• therefore area is 14000 cm²

hope it helps you

Answer 2

if the parameter is 480cm

and length is 140cm or 1.4m.

let's consider the breadth is x cm

then the parameter will be

{2(140+x)} cm

so

{2(140+x)}=480

= 280+2x=480

=2x= 480-280

=2x=200

=x=200/2

x=100

so the breadth is 100cm or 1 m.

so the area will be-(140×100)cm²= 14000cm²

or 140m²