Question

The floor of a rectangular hall has a perimeter 260 m. The cost of painting the four walls at the rate of 10 per m² is 13,000. Find the height of the hall​

Answer 1

Let the length, breadth and height of the rectangular Hall be l m, b m and h m respectively

Perimeter = 260 m

= 2(l+b) = 260

= l+b= 130 --(1)

Area of the four walls

= 13000/10 = 1300 m^2

= 2(l+b)h = 1300

= (l+b)h = 650

= 130h = 650 [ using (1) ]

= h = 650/130

= h = 5m

Hence, the height of the Hall is 6m.

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