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27 small cubes are glued together to make a big cube.The exterior of the big cube is painted yellow in colour. How many among each of the 27 small cubes would have painted yellow on a)only one of its faces? b)two of its faces? c)three of its faces?

27 small cubes are glued together to make a big cube.The exterior of the big cube is painted yellow in colour. How many among each of the 27 small cubes would have painted yellow on
a)only one of its faces?
b)two of its faces?
c)three of its faces?

Grade:7

3 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
7 years ago
One only on surfaces that is shared by one surface only.
2 will be edges except corners
3 will be 8 edges of cube
Sagar singh
38 Points
7 years ago
(a) 6
(B)12
(C)8
see only the innermost cube would be left unpainted so 6+12+8=26
there are 8 vertces of a cube so 8 will be painted fron 3 sides
 
Goodie
13 Points
3 years ago
 
(i) 6
(ii) 10
(iii) 8
 this is the answer for question.
(i) in first 3*2
(ii) in second 2*5
(iii) in third 2*4
 

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