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Prism

If all the fa...

Question

If all the faces of a cube, whose edge is 15 cm, is coloured black, and then it is cut into small cubes, each of edge 3 cm, then how many pieces will …

Q. … have 3 faces coloured?

A

5

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B

6

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C

8

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D

15

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Solution

The correct option is C 8
$N o . o f p i e c e s o n a n e d g e = n = 15 / 3 = 5$
$3 - f a c e s c o l o u r e d = a l w a y s 8.$

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