Please solve question 1
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Given :-
The floor of a rectangular hall has a perimeter of 150 m. If the cost of painting four wall at the rate Rs. 10 per m² is Rs. 9000
To Find :-
Height
Solution :-
Area of four walls = Cost/Rate
⇒ Area = 9000/10
⇒ Area = 900 m²
Now
We know that
Area of four walls = 2(l + b) × h
Now
We know that
Perimeter = 2(l + b)
150 = 2(l + b)
So,
⇒ 900 = 2(l + b) × h
⇒ 900 = 150 × h
⇒ 900/150 = h
⇒ 6 = h
Therefore, Height of wall is 6 m
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