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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. … be there in total?

A

64

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B

125

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C

216

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D

45

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Solution

The correct option is B 125
$N o . o f p i e c e s o n a n e d g e = n = 15 / 3 = 5$
$T o t a l p i e c e s = n^{3} = 5^{3} = 125.$

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