Question

the floor of a rectangular hall has a perimeter 250m . if the cost of painting the flour walls at the rate $10 per m² is $,15000, find the height of the hall.(hint)-area of the four walls =lateral surface area.​

Answer 1

Step-by-step explanation:

Given,

Perimeter of rectangular hall= 250 m

so, l+b = 250 m

Given cost of painting the four walls is 15000$ at 10$ per sq.m

So, L.S.A painted = 15000/10

=1500 sq.m

To paint four walls we require to find lateral surface area (L.S.A)

L.S.A = 2(l+b)h

1500 =2(250)h

1500 = 500h

so h= 1500/500

=30 m

Answer 2

Answer:

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