the length,breath and height of a room are 5m 4m and 3m.find the cost of painting the walls of the room and ceiling at the rate of rs 50/m square
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given
length =l=5m
breadth=b=4m
height =h=3m
1)area of wall painted = area of the four walls+area of the ceiling
=2(l+b)h+lb
=2(5+4)3+5*4
=2*9*3+20
=54+20
=74 square meters
2) cost of painting for 1sq m = Rs 50
cost of painting 74square m =50×74
= Rs3700
length =l=5m
breadth=b=4m
height =h=3m
1)area of wall painted = area of the four walls+area of the ceiling
=2(l+b)h+lb
=2(5+4)3+5*4
=2*9*3+20
=54+20
=74 square meters
2) cost of painting for 1sq m = Rs 50
cost of painting 74square m =50×74
= Rs3700
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