The length,breadth and height of a room a are 5.5m, 3.2m and 3m respectively find the cost of painting the wall at 10 per square metre and whitewashing the ceiling at rupees 1.50 per square metre.
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length of room:5.5m
breadth of room:3.2m
height of room:3m
Therefore total area of room: lsa (rectangle)+l×b
=2h(l+b)+l×b
=2×3(5.5+3.2)+5.5×3.2
=6(8.7)+17.60
=52.5+17.60
=70.1
Now,rate of whitewashing=Rs1.50
cost of white washing= Rs 10.51(approx)
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