Read the following information's and answer the question.
I. The length, breadth and height of a rectangular piece of wood are 4 cm , 3 cm and 5 cm respectively.
II. Opposite sides of 5 cm x 4 cm piece are coloured in red.
III. Opposite sides of 4 cm x 3 cm are coloured in blue.
IV. Rest sides of 5 cm x 3 cm are coloured on green in both sides.
V. Now the piece of is cut in such a way that cubes of 1 cm x 1 cm x 1 cm will be made.
How many cubes shall not have any colour ?

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No any

answer is D.

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Detailed Solution

No. surface coloured $= (ℓ - 2) (b - 2) (h - 2)$

$= 3 \times 1 \times 2 = 6$

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