Question

the floor of rectangle hall has a perimeter 250 m . if the cost of painting the four walls at rupees 10 per metre square in rupees 15000, find the height of the hall (hint - area of the four walls =
lateral surface area)

Answer 1

area of 1m^2 × total area = total money
10 ×total area = 15000.
total area = 15000/10
=1500.
its the total area of four walls..
remaining answer is in pic friend

Answer 2

$perimeter \: of \: floor = 2(l + b) \\ 250 = 2(l + b) \\ l + b = 125m \\ \: \: l ateral \: surface \: area \: of \: cuboid = 2h(l + b) \\ 250h = lsa \: of \: cube \\ cost \: of \: painting \: it = 15000 \\ 15000 \div 10 = 1500 {m}^{2} \\ now \: \\ 250h = 1500 \\ h = 1500 \div 250 \\ h = 60m$
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