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The /1,oor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of f 10 per m2 is f 15000, find the height of the hall. [Hint: Area of the four walls = Lateral surface area.]

The /1,oor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of f 10 per m2 is f 15000, find the height of the hall.
[Hint: Area of the four walls = Lateral surface area.]

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 6228 Points
3 months ago
Area of four walls = 2(l + b) x h = perimeter x h = 250 x h m2 Cost of painting = " 10 x 250 x h = l' 2500 h 2500 h = 16000 h = 6 m. Thus, the height of the hall = 6 m.

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