Answers

2014-01-25T23:00:15+05:30
Volume of original cube=12*12*12=1728 cm^3. therefore volume of smaller cubes=216 cm^3.
so, length of side of smaller cube = cube root of 216 = 6 cm. surface area of original cube = 6a^2=6*12*12=864 cm^2. surface area of one of the smaller cubes=6*6*6=216 cm^2. therefore total surface area of all the smaller cubes = 8*216 = 1728 cm^2. hence ratio of surface areas = 864 / 1728 = 1/2. 
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