the length breadth and height of a room are 5m 4m 3m respectively.find the cost of white washing the inner of the room and ceiling at the rate of rs.50 per square metre.
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Area of ceiling= 5×4= 20m^2 Area of 4 walls= 4×(4×3)=48m^2 Total area to be painted= 20+48= 68m^2 Total cost= 50×68= Rs.3400
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