A square and 2 semicircles were cutout from a square cardboard as shown in the figure. (use \[\pi =3.14\]) The area of cardboard left is
A) \[714\,c{{m}^{2}}\]
B) \[900\,c{{m}^{2}}\]
C) \[300\,c{{m}^{2}}\]
D) \[186c{{m}^{2}}\]
Correct Answer: D
Solution :
Required area = Area of shaded part = Area of big square - Area of unshaded part \[=(30\times 30)-714=900-714\] \[=186\,c{{m}^{2}}\].
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