Question

I have 256 fence and the lengths are 3 times it's width. What are the lengths ?

Answer 1

If this is a rectangle, then the answer is the length=96 units
I just formed two linear equations that follow the information. 

$(1)...2l+2w=256$

$(2)...l=3w$


Then, I solved for w by using substitution. W is 32. I then multiplied it by 3. I get the length as 96.