A wooden bookshelf has external dimensions as follows: Height \( =110 \mathrm{~cm} \), Depth \( ... VIDEO
A wooden bookshelf has external dimensions as follows: Height \( =110 \mathrm{~cm} \), Depth \( =25 \mathrm{~cm} \), Breadth \( =85 \mathrm{~cm} \) (see Fig. 1. The thickness of the plank is \( 5 \mathrm{~cm} \) 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 \( -\mathrm{cm}^{2} \) and the rate of painting is 10 paise per \( \mathrm{cm}^{2} \), find the total expenses required for polishing and painting the surface of the bookshelf.https://bit.ly/YTAI_PWAP https://www.pw.live
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