1.

The volumes of two spheres are in the ratio 64:27. Find the difference of their surface areas, if the sum of their radii is 7 units.

A.  \[\left( 2P+\frac{{{P}^{2}}}{100} \right)%\]                    
B.  \[\frac{{{P}^{2}}}{2}%\]
C.  \[62\frac{6}{7}sq.cm\]         
D.  \[57\frac{3}{4}sq.cm\]
Answer» B.  \[\frac{{{P}^{2}}}{2}%\]


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