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Surface area of the big cube of 4 cm=6*4² cm²=96 cm²
Volume of the big cube of 4 cm= 4*4*4 cm³.
Area of 1 small cube of 1 cm=1*1*1 cm³
Therefore, no. of cubes =4*4*4/1*1*1
Surface area of 1 small cube=6*1² cm³=6 cm³
Surface area of 64 small cubes=6*64 cm²=384 cm².
Required ratio:
96 cm²:384 cm²