A feild is in the form of a parallelogram , whose perimeter is 450m . find the lengths of all sides.

The data seems missing. With only given perimeter we cant find the length of all the sides of parallelogram. S, please check your question once and do get back to us. With the given parameter, we can find the sum of the adjacent sides of parallelogram as shown below;
Perimeter of parallelogram = $2\left(l+b\right) = 450 \mathrm{m}$
$\left(l+b\right) = \frac{450}{2} = 225$
Therefore sum of the adjacent sides of parallelogram is 225 m.