Read the following information and answer the questions based on it.
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 colour.
III. Opposite sides of 4 cm. x 3 cm. are coloured in blue
IV. Rest 5 cm. x 3 cm. are coloured in green in both sides
V. Now the piece is cut in such way that a cubes of 1 cm x 1 cm x 1 cm are made.
How many cubes have only two colours red and green in their two sides ?
The number of cubes that have red and green on them are the ones that exist on the edges. The edge that is common to the red and green faces is the 5 cm edge. So, there are a total of (5-2)*4 = 3*4 = 12 such cubes.
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