Question

3. 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 mºis 15000, find the height of the hall.
(Hint: Area of the four walls = Lateral surface area.]
25 m​

Answer 1

Perimeter of rectangular hall = 2(l + b) = 250 m

Total cost of painting = Rs.15000

Rate per m2 = Rs.10

Area of four walls = 2(l + b) h m2 = (250×h) m2

A/q,

(250×h)×10 = Rs.15000

⇒ 2500×h = Rs.15000  

⇒ h = 15000/2500 m

⇒ h = 6 m  

Thus the height of the hall is 6 m.

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Answer 2

Answer:

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