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A wooden bookshelf has external dimensio...

A wooden bookshelf has external dimensions as follows: Height =110 cm, Depth = 25 cm, Breadth = 85 cm. The thickness of the plank is 5 cm everywhere. The external faces are to be polished and the inner faces are to be painted. If the rate of polishing is `20 paise per cm^2` and the rate of painting is `10 paise per cm^2`.Find the total expenses required for polishing and painting the surface of the bookshelf.

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