Question

find the length of the rectangle whose perimeter is 400 CM who breadth is 120 CM ​

Answer 1

Answer:

Given

Perimeter of the rectangle = 400 cm

Length ( l ) = ?

Breadth ( b ) = 120 cm

Perimeter of rectangle = 2 ( l + b ) = 400

===> 2 ( l + 120 ) = 400

===> l + 120 = 400 / 2

===> l + 120 = 200

===> l = 200 - 120

===> l = 80 cm² .

The length of the rectangle is 80 cm² .

Answer 2

Answer:

80 cm

Step-by-step explanation:

P= 400cm

b=120cm

P= 2(l+b)

400=2(l+120)

400=2l + 240

400-240= 2l

160= 2l

l= 160÷2

l= 80cm

Hence, length of the rectangle = 80 cm.