Question

Aliza is decorating a rectangle shaped bulletin board in the school's
lobby. The length of the bulletin board is 18 cm and its breadth is 12
cm. She decided to add a black border around the entire bulletin
board. What is the length of the border that she needs?​

Answer 1

Given:

The length of the bulletin board = 18 cm

The breadth of the bulletin board = 12 cm

To find:

The length of the border that Aliza needs.

Solution:

The length of the black border around the entire bulletin would be the same as the perimeter of the bulletin board.

Perimeter of the bulletin board =2(length+ breadth)

= 2(18 + 12)

= 2×30

= 60 cm

Thus, Aliza would require 60 cm of border to add around the entire bulletin.

Answer 2

We Know,

Length Of The Bulletin Board=18 cm

Breadth Of The Bulletin Board=12 cm

To Find

The Length Of The Black Border That Aliza Needs To Cover The Bulletin

Solution☬

The black border around the entire bulletin board is same as the perimeter of bulletin board

Perimeter of Bulletin Board=

2(Length+Breadth)

=2(18+12)

=2×30

=60cm

So, She Needs 60 cm to add a black border around the bulletin

Hope This Helps You ❤️