a room is 7.5m long , 10.5 m wide and 5m high . It has a window of dimensions 2.5m×3m and a door of dimensions 4m × 4.5m . find the coast of painting it's walls at the rate of ruppes 50 per sq.m. (perimeter and area)
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hSand and water can be separated by any of the following two methods: (a) Sedimentation and decantation: Mixture is kept undisturbed for some time. After some time, sand being heavier and insoluble in water, settles down at the bottom of container. Now, water is poured into another container to separate it from sand.
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