Help please

Your question doesn't really make sense.
do you mean a plot of land? That would be measured in square metres.
If the plot is rectanglar there is an infinite number of different answers.
Sorry, you will need to be more precise.

my english isnt that good with maths. lets just say i have a land. its space is 1000idontknowwithwhatyoumeasurespace. i need to know length and width. : D

If the area is a cube than its dimensions would be 10, 10, and 10.

ok
Firstly Mcfood, area cannot be cubic
Area must be in square units and Volume is measured in cubic units.
Land is an area.
so the size is probably supposed to be 1000 square metres.

I'll assume it is a rectangular parcel of land.
It could be 100m by 10m
or, it could be 50m by 20m
or, it could be 5m by 200m
There are countless possible answers.
So long as the breadth times the length = 1000
Area of a rectangle
A=l * b