". The following figure shows a square card-
board ABCD of side 28 cm. Four identical
circles of largest possible size are cut from
this card as shown below.
D
с
А
B
Find the area of the remaining card-board.
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2
Answer:
According to the figure,
Radius of the each circle=7cm
Area of one circle=π(7)
2
Therefore,
Area of 4 circle=4π(7)
2
=4×
7
22
×7×7
=616
Area of square=28
2
=784
Therefore,
Remaining area=(28)
2
−4π(7)
2
=784−616
=168cm
2
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