Question

A rectangular field 50m wide and xm long, requires 260m of fencing. find x.
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Answer 1

80

Explanation:

use formula for perimeter of rectangle but put X in place of length 50 m as breadth. so,

2(50+X)= 260

solve this and you will get X= 80

Answer 2

80

Explanation:

Perimeter area = 2(l × w)

Plug in:

2(x + 50) = 260

2x + 100 = 260

-100 -100

---------------------

2x = 160

---- -----

2 2

x = 80

So, x will be 80