Question

the floor of rectangular hall has a perimeter of 250 m . If the cost of painting the four wall at rs12/m^2 is 18000 . find the height of wall​

Answer 1

Answer:

Given:-

Perimeter of Rectangle = 250m

Cost of Painting the four walls Per m = Rs.10

Total Cost of Painting = Rs15000

To Find:-

The Height of the hall

Formulae used:-

Lateral Surface area = 2 ( l + b )h

Perimeter of Rectangle = 2 ( l + b )

Where,

l = Length

b = Breadth

h = Height

Now,

→ Area of four walls =  

→ Area of four walls =  

→ Area of four wall = 1500m²

Therefore,

→ Area of four wall = Lateral Surface area

→ 1500 = 2 ( l + b )h

But Perimeter is given

So,

→ Perimeter = 2 ( l + b )

→ 250 = 2 ( l + b )

Now,

→ 1500 = 2 ( l + b ) h

→ 1500 = 250h

→ h = 1500/250

→ h = 6

Hence, The Height of floor is 6m.

Step-by-step explanation: