Question

The floor of a rectangular hall has a perimeter 250m. If the cost of painting the four walls at the rate of ₹10 per m² is ₹15000, find the height of the hall.​

Answer 1

Answer:

perimeter = 250

cost of painting 4 wall is =15000rs

cost of painting on wall is =1500/4=350

Answer 2

Answer:

Area of 4 walls = 2lh + 2bh

= 2(b + l)h

Perimeter of floor of a wall = 2b + 2l = 250m

2(l+b) = 250m

2(l+b)h = 250hm²

Rate of Painting = ₹10/cm²

Total cost = ₹2500h

Painting of cost of walls = ₹15000

$h = \frac{15000}{2500}$

h = 6m

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