Oliver is decorating the bulletin board in the school's lobby. The bulletin board is a 9ft by 12ft rectangle. He decides to add a black border around the entire bulletin borad. What is the length of the border that he needs?
Answers
Answered by
31
Answer:
108ft.
Step-by-step explanation:
Length of the board = 9ft.
Breadth of the board= 12ft.
The length of the border that is needed to cover the entire board = Perimeter of the board
= 9×12
= 108 ft.
Answered by
7
Answer:
42ft
Step-by-step explanation:
Length= 9 ft
Breadth= 12 ft
the length of the border of board= perimeter of board
so board is rectangle.
So
Perimeter of rectangle= 2×(Length + breadth)
= 2×(9ft +12ft)
= 2× 21 ft
= 42 feet
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