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A circle of perimeter 28cm is opened to form a ... - JAMB Mathematics 2011 Question

A circle of perimeter 28cm is opened to form a square. What is the maximum possible area of the square?
A
56cm2
B
49cm2
C
98cm2
D
28cm2
correct option: b
Perimeter of circle = Perimeter of square

28cm = 4L

L = \(\frac{28}{4}\) = 7cm

Area of square = L2

= 72

= 49cm2
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