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The floor of a rectangular hall has a perimeter 250m . if the cost of painting the four walls at the rate of 10 per m^2 is Rs15000 . Find the height of the hall .

Answers (1)

D Deependra Verma

Solution : Let the height of the hall be $h$ metres . Then ,

Area of the four wall $=$ perimeter of the floor $imes$ Height $=$ $(250 imes h)m^2=250h m^2$

cost of painting of 1 square metre $=Rs 10$

$herefore$ cost of the painting of the four walls $=Rs(250h imes 10)=Rs2500h$

But, it is gives that the cost of painting of four walls is Rs 15000.

$herefore$ $2500h=15000Rightarrow h=frac150002500=6$

Hence , the height of the hall is 6m .

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