what is the total cost incur on painting the wall with following dimensions at the rate of painting the wall is 35 rs per m²
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Answer:
Step-by-step explanation:
Let h be the height.
Rate of covering the floor with mat = Rs 25 per square metre
Total cost for floor = RS 2700
Area of the floor = (total cost)/ (cost per meter)
Area of the floor =
25
2700
=108m
2
Breadth = (area of the floor) / Length =
12
108
= 9m
Length of a wall = 12 m
Rate of painting the four walls of a room = Rs 30 per square metre
Total cost = RS 7560
Again,
Area of walls = (total cost)/ (cost per meter) =7560/30=252m
2
Now,
Area of 4 walls = 2(Length of walls × Height of walls) + 2(Breadth of walls × Height of walls)
252=2(12×h)+2(9×h)
252=24h+18h
252=42h
h=6
⇒ Height is 6 m
Therefore dimensions of the room are :12m×9m×6m
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