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A class room is 7\ m\ long,\ 6. 5\ m\...

A class room is `7\ m\ long,\ 6. 5\ m\ w i d e\ a n d\ 4\ m\ h igh` . It has one door `3m\ x\ 1. 4 m\ ` and three windows, each measuring `2m\ x\ 1\ mdot` The interior wall are to be colour washed. The contractor charge `R s .5.25\ p e r\ s qdotmdot\ ` Find the cost of colour washing.

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