Question

Question
help please

Answer 1

Answer:

6 m.

Step-by-step explanation:

Let the height of the hall be 'h' metres.

Given, Perimeter = 250 m.

Area of 4 walls = 2(l + b) * h

                         = Perimeter * h  {∴ We know that Perimeter = 2(l + b)}

                         = 250 * h m².

∴ Cost of painting on 1 m² = 10.

∴ Cost of painting on (250 * h) m² = (250 * h) * 10.

But, Given total cost of painting = 15000

⇒ (250 * h) * 10 = 15000

⇒ 250 * h = 1500

⇒ h = 6 m.

Therefore, height of wall = 6 m.

Hope it helps!

Answer 2

Step-by-step explanation:

Given perimeter of the rectangular floor = 250 m

Hence 2(l + b) = 250

Therefore, (l + b) = 125 --- (1)

Area of four walls, A = 15000/10 = 1500 sq m

That is 2h(l + b) = 1500

2h x 125 = 1500

h = 1500/250 = 6

Thus the height of the hall is 6 m.