a hall is 25 m long 20 m broad and 5 M height find the cost of painting its four walls and its ceiling at rupees 10 per square metre brother or sister answer should come 9500
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yashwanthSN0247:
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Solutions :-
Given :
Length of hall = 25 m
Breadth = 20 m
Height = 5 m
Find the area of its four wall :-
Curved surface area = 2h (l + b) sq. units
= 2 × 5 (25 + 20) m²
= 10 × 45 m²
= 450 m²
Find the area of ceiling :-
Area of rectangle = (Length × Breadth) sq. units
= (25 × 20) sq. units
= 500 m²
Find the cost of painting its four walls and its ceiling at Rs 10 / m² :-
1 m² = Rs 10
(450 + 500) m² = Rs (10 × 950) = Rs 9500
Hence,
Cost of painting its four walls and its ceiling at Rs 10 / m² = Rs 9500
Given :
Length of hall = 25 m
Breadth = 20 m
Height = 5 m
Find the area of its four wall :-
Curved surface area = 2h (l + b) sq. units
= 2 × 5 (25 + 20) m²
= 10 × 45 m²
= 450 m²
Find the area of ceiling :-
Area of rectangle = (Length × Breadth) sq. units
= (25 × 20) sq. units
= 500 m²
Find the cost of painting its four walls and its ceiling at Rs 10 / m² :-
1 m² = Rs 10
(450 + 500) m² = Rs (10 × 950) = Rs 9500
Hence,
Cost of painting its four walls and its ceiling at Rs 10 / m² = Rs 9500
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