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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 / satheesh
total number of smaller cubes of size 1cm = 98
out of these 98 cubes,
since four sides r painted
9*4 -> painted on 1 side.... 36*5 = 180 unpainted faces
5*4 -> painted on 2 sides... 20 * 4 = 80 unpainted faces
no-> painted on 3 sides
total = 180+80= 260 unpainted faces..
| Is This Answer Correct ? | 6 Yes | 33 No |
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