Question

The perimeter of floor of rectangular hall is 250m. The cost of the white washing its four walls is
Rs. 15000. The height of the room is??
​

Answer 1

Answer:

lateral surface area = 2(l+b) h

= 250×2×h= 500h m²

Now, 15000 = 500h => h = 30 m

Answer 2

Answer:

The height of the hall is 6 m.

Step-by-step explanation:

Perimeter of the floor of hall = 250 m.

Cost of painting the four walls = Rs.15,000

Let the dimension of rectangular hall be  m.

Area of four walls is given by,

....(1)

Perimeter of the floor of hall is given by,

We have given P=250 m

....(2)

Substitute (2) in (1),

Cost of painting per m² area = Rs.10

Cost of painting   area =  

Cost of painting   area =  Rs.2500h

The cost of painting the walls is Rs.15000 .

i.e.  

Therefore, the height of the hall is 6 m.

#Learn more

"Question 3 The floor of a rectangular hall has a perimeter 250 m. If the cost of panting the four walls at the rate of Rs.10 per m^2 is Rs.15000, find the height of the hall. [Hint: Area of the four walls = Lateral surface area.]

Step-by-step explanation: