A hollow cube of size 5cm is taken , with the thickness
of 1cm . it is made of smaller cubes of size 1cm . if the
outer surface of the cube is painted how many faces of the
smaller cubes remain unpainted?
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Answer Posted / anni
Answer:: is 488.how this is
first take 5 cm cube so its volume is 5^3=125
and it is hallow of 1 cm thickness so the inner cube has 3cm
edge
so its volume is 27
subtraction 125-27=98
so 98 1cm cubes can be made
in those 98
18 are no color face cubes so no of faces which are not
coloured are 18*6=108
20 are two color face cubes so 20*4=80 faces are not coloured
60 are one colored faces so 60*5=300 faces are not coloured.
so totally 108+80+300 faces are not colored
| Is This Answer Correct ? | 10 Yes | 8 No |
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