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A hollow cube of size 5 cm is taken, with a thickness of 1
cm. It is made of smaller cubes of size 1 cm. If 4 faces of
the outer surface of the cube are painted, totally how many
faces of the smaller cubes remain unpainted?
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Answer / teena
the volume of the cube is 125... so its is made up of 125 smaller cubes. cubes have 8 faces ...so total no of faces =125*8=1000.. one face of the larger cube is made up of 25 faces of the smaller cube (5*5 area)
so 4 faces of the outer surface =4*25=100 faces are painted.. the remaining=1000-100
900
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