This formula can be written as A L W or as A LW. Surface Area Of A Rectangular Box Formula For a cube or rectangular box the formula becomes even easier. A length width a b A length width a b.
So the area of the rectangle is 250 m 2.
If the diagonal d and one side s of the rectangle are known the following area formula can be used. Step 1 Set up the formula for area of a rectangle. If you dont have the area you can use the rectangles perimeter instead. Find the area of a rectangle if its length is 25 m and breadth is 10 m.