A class room is 7m*6.5m*4m.it has one door 3m*1.4m and three windows 2m*1m the interior walls are to be colour washed.the contractor charge rs.10.5/m^2.find the cost of colour Washing
Wall paper,312m long,25m wide is required to cover the wall s of the room.length of room is 7m and it's breadth is twice the height find height of the room
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