Find the area of the remaining part of cardboard, Mathematics

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From a sheet of cardboard in the shape of a square of side 14 cm, a piece in the shape of letter B is cut off. The curved side of the letter consists of two equal semicircles & the breadth of the rectangular piece is 1 cm. Find the area of the remaining part of cardboard.                     (Ans: 143.5 cm 2 )

Ans:    Area of remaining portion = Area of square - Area of 2 semi circles - Area of rectangle

= 14 x 14 - Π x 3.52 - 14 x 1

=196 -22/7  x 3.5 x 3.5 - 14

 

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=196 - 38.5 - 14 = 143.5 cm2


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