A room is 10m long, 6m wide and 4.2 m high . It has one door of 2.5m ×1.5m and one window of dimension 1.5m×1m. Find the cost of whitewashing the walls at ₹2.50 per sq.m.
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area of four wall =252
area of one door and one window =4.80
Area of four walls=4.80
area of one door and one window =4.80
Area of four walls=4.80
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