CBSE Class 9 Answered
The floor of a hall with square base has a perimeter 200 m. If the cost of painting the four walls at the rate of Rs 10 per m2 is Rs 20000, find the height of the hall.
Asked by Topperlearning User | 23 Aug, 2017, 01:12: PM
Expert Answer
Perimeter of a square shaped floor=200 m
4a=200
a=50m
Thus, length (a) =50 m, breadth (a) =50 m and Let height =h
Area of wall painted for Rs 10=1 m2
Area of wall painted for Rs 20000=2000 m2
Thus area of four walls =2000 m2
2(length + breadth) height=2000
2(50+50) h=2000
h=10 m
Thus height of the wall is 10 m.
Answered by | 23 Aug, 2017, 03:12: PM
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