The length of square $ABCD$ shown in the diagram is $42\, cm .$ The shaded design is formed by drawing semicircles on all the sides of the square. Find the area of the shaded design. (in $cm^2$)
The length of square $ABCD$ shown in the diagram is $42\, cm .$ The shaded design is formed by drawing semicircles on all the sides of the square. Find the area of the shaded design. (in $cm^2$)
- A
$1008$
- B
$1013$
- C
$1248$
- D
$1140$
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