A square of cardboard is taped at the perimeter by a piece of ribbon 20cm long. What is the area of the board?
A
20sq.cm
B
100sq.cm
C
25sq.cm
D
16sq.cm
E
36sq.cm
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
Perimeter of a square = 4(S) where S is each side of the square
Perimeter = 20(given)
4S = 20
S = \(\frac{20}{4}\) = 5
Area S\(^2\) = 5\(^2\) = 25
Source: Myschool Past Questions Archive (Record #32656)