Question
Four circular cardboard pieces , each of radius 7 cm are placed in such a way that each piece touches two other piece . The area of the space enclosed by the four piece is
Answer: Option B
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Required area = `(14 xx 14 - 4 xx 1/4 xx 22/7 xx 7 xx 7 ) cm^2`
= `(196 - 154) cm^2` = `42 cm^2`
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