Math, asked by Samraath, 3 months ago

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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Answers

Answered by subhsamavartj
1

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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