Question

How do you solve this step by step

Answer 1

To solve, you have to find the perimeter of the board since you are decorating it. The formula for that is
P = (L x 2) + (W x 2)
P = (10 x 2) + (6 x 2)
P = 20 + 12
Perimeter = 32 ft.
Sydney needs 32 ft. of ribbon to border the board. 

Answer 2

Display board measurements = 10ft by 6ft
So all the sides would be 10ft, 10ft, 6ft, 6ft
Add them all together= 32ft
Ribbon length would need to be 32ft long