Question

The length of a rectangle is 12 cm more than it’s breadth. the

perimeter is 144 cm, find its length and breadth.​ please who will answer first will be brainlist so please​

Answer 1

Answer:

Let the length of the rectangle = l

Let the breadth of the rectangle = b.

Given that the length of the rectangle is 12cm more than its breadth.

l = b + 12  ------------- (1)

We know that perimeter of the rectangle = 2(l + b).

Given that perimeter of the rectangle = 144cm.

2(l + b) = 144

2(b + 12 + b) = 144

2(2b + 12) = 144

2b + 12 = 72

2b = 60

b = 30.

Breadth b = 30cm.

Length = b + 12

           = 42cm.

verification:

2(l + b) = 144

2(30 + 42) = 144

2(72) = 144

144 = 144

Step-by-step explanation:

Answer 2

Answer:

let breadth is x

then length is x+12

formula of perimeter is 2*(Length + breadth )

then 2*(x + x+12 ) = 144

2x+12 = 72

2x = 72-12

2x = 60

x = 60 ÷ 2

x= 30

so , breadth is 30

length is x+12

then , 30+12

= 42

length =42

breadth = 30