Question

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of 10 per meter square is Rs 15,000. Find the height of the hall.

Answer 1

Area of four walls =
$\frac{15000}{10}$

Area of four walls = 1500

Now,

As we know that area of four walls is 2(l+b) *h


Then,

1500 = perimeter*height

1500 =250*height

1500/250 = height

150/25 = height

6m = height


I hope this will help you



-by ABHAY