1.

Three solid cubes of sides 1 cm, 6 cm and 8 cm respectively are melted to form a new cube. Find the surface area of the cube so formed.

A.  \[520\,\,c{{m}^{2}}\]             
B.  \[486\,\,c{{m}^{2}}\] 
C.         \[289\,\,c{{m}^{2}}\] 
D.         \[300\,\,c{{m}^{2}}\]                         
Answer» C.         \[289\,\,c{{m}^{2}}\] 


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