A door frame of area 12.4m square is fixed in a wall of dimension 12m× 15m.Find the cost of painting the wall at the range ₹2.5 per layer if four layers are coated.
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perimeter of door =12.4*4=49.6
perimeter of wall = 12m*15m=180m
difference=180-49.6=30.4
cost =2.5*30.4=76
perimeter of wall = 12m*15m=180m
difference=180-49.6=30.4
cost =2.5*30.4=76
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