Question:Four circular cardboard pieces, each of radius 7 cm are placed in such a way that each piece touches two other pieces, The area of the space enclosed by the four pieces is : 

A `21 cm^2` 
B `42 cm^2` 
C `84 cm^2` 
D `168 cm^2` 

+ Answer
B 

+ Explanation
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`

+ Report

Irin Moni

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