Question

the floor of a rectangular hall has a perimeter of 150m. if the cost of painting the four walls at the rate of Rupees 10 m^2 is Rupees 9000. find the height of the wall

Answer 1

Hey!

Answer: Height - 6m

Solution-perimeter=2(a+b)=150m

So a+b=75

And a=75-b

Now total area of 4 walls =9000/10=900

Let height be c

So 2(ac+bc)=900

ac+bc=450

(75-b)c+bc=450

C=450/75=6m

Hope this helps!

~LENA~