Problema Solution
A fence is to be placed around a rectangular plot so that the enclosed area is 800ft^2 ant the length of the plot is twice the width. How many feet of fencing must be used?
Answer provided by our tutors
let 'w' represent the width, then '2w' represents the length
area = length * width
800 = w * 2w
3w = 800
w = 800/3
2*(800/3) = 1600/3
the width is 800/3 and the length is 1600/3
we need to find the perimeter in order to know how much fencing to use
perimeter = 2(width + length)
2(1600/3 + 800/3) = 1600
1600 feet of fence must be used