2different shapes with an area of 6 square units and perimeter of 12 units

Square and rectangle

Other example:
To understand the given problem use the formular of area.

Hence, area is the length and width of the object in unit squared.

Mathematically expressing, a = l x w
Since a = l x w 
a = lw unit squared

Given:
Area = 112 cm2

Square root of Area = Square root of 112 cm2
Area = 10.58 cm

Check:
Area = (10.58 cm)^2
Area = 111.9 / 112

Yes of course i will indeed you with your problem.