Answer:

8.06ft

Step-by-step explanation:

step one:

This problem is on the mensuration of solids,

given that the area is 65ft^2

step two:

we know that the expression for the area of a solid is

areaa= length* length

area= l^2

step three:

substituting the value of the area into the expression we have

65=l^2

we need to square both sides to solve for l we have

√65=l

l= 8.05ft

step four:

From the analysis we found the length of one side to be 8.06ft