Question

A 4cm cube is cut into 1cm cubes. calculate the total surface area of the three cubes​

Answer 1

total surface area of a cube is 6a^2.

so 3 cubes of 1cm side will have surfare area 3×6a^2 = 18 cm^2

Answer 2

ANSWER

Vol. of 4cm cube =(4)3cm3 =64cm3

Vol. of 1cm cube =(1)3cm3 =1cm3

Total no. of 1cm cubes $$= \dfrac {Vol. of \ 4 \ cm  \ cube }{Vol. \ of \ 1 \ cm  \ cube} $$

                                    

                                      =164

                                    

                                      =64

Surface area of 1 cube =6(side)2cm2

Surface area of 1 cube =6(1)2cm2

Surface area of 1 cube =6cm2 

Total surface area of all small cubes =64×6cm2

 

                                                             =384cm2