1.

A solid cube of each side 10 cm, has been painted red, blue and black on pairs of opposite faces. It is then cut into cubical blocks of each side 2 cm. Answer the following questions. How many cubes have two faces painted red and black and all other faces unpainted?

Answer»

36
24
12
8

Solution :In this QUESTION X = 10 and x = 2
Such CUBES are
`1/3[12(10/2-2)]=1/3xx36=12`.


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