Question

the floor of rectangular hall has a perimeter 250m if the cost of painting the four was @ rupees 10 per metre square is 15000 find the height of the hall?

Answer 1

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Answer 2

perimeter=2(l+b)=250
cost of painting for four=15000
area of wall=2lh+2bh=2h(l+b)
l+b=1500/h
put this in equation of perimeter
125=1500h
h=12