Q-4.The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of 10 Rs per m2 is Rs. 15000, find the height of the wall ?
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Answer:
Lateral surface area = 2 x height (length + wide)
perimeter = 2( length + width)
length + wide = 125
area costing of
lateral surface are painting = 15000/10=1500
m^2
height =1500/250=6 m
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