SOLUTION: The perimeter of a rectangular field is 168 feet, the field is 36 feet wide. How long is the field?

Algebra ->  Rectangles -> SOLUTION: The perimeter of a rectangular field is 168 feet, the field is 36 feet wide. How long is the field?       Log On


   

Question 866635: The perimeter of a rectangular field is 168 feet, the field is 36 feet wide. How long is the field?
Found 2 solutions by JulietG, jim_thompson5910:
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
2L + 2W = 168
w = 36
Substitute the value of W into the first equation.
2L + 2(36) = 168
2L + 72 = 168
Subtract 72 from each side
2L = 96
Divide each side by 2
L = 48

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
P = 168 (given perimeter)
W = 36 (given width)
L = unknown (we'll leave it as L for now)


P = 2*(L+W) ... perimeter of rectangle formula


168 = 2*(L+36) ... plug in L = 36 and P = 168, then solve for L (ie isolate it)


168 = 2*L+2*36


168 = 2L+72


168-72 = 2L


96 = 2L


2L = 96


L = 96/2


L = 48


The length of the field is 48 feet