Question

the floor of rectangular hall has perimeter 250 m. it's height is 5m . Find the cost of painting its four walls (including doors, windows, etc ) at the rate of ₹8 per sq. m​

Answer 1

Answer:

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Step-by-step explanation:

Given :

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• Perimeter of the hall = 250 m
• Height of the hall = 5 m

To Find :

• Cost of painting the four walls at the rate of ₹8 per m² .

Solution :

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• Area of the four walls = Perimeter of the floor × Height

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• We know perimeter of Rectangle → 2(l + b)

• Therefore, substituting the values in it, we get

⟹ 2( l + b ) h

⟹ 250 × 5

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⟹ 1250 m²

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• From the given cost of painting of 1 square metre was ₹8 then cost of painting of the four walls is

= Total area × Cost

⟹ 1250 × 8

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= ₹ 10,000

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As per the Question the cost of painting of the four walls is ₹ 10,000.

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₹ 10,000

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Answer 2

Step-by-step explanation:

Solution :

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Area of the four walls = Perimeter of the floor × Height

⠀⠀⠀⠀⠀⠀⠀⠀

We know perimeter of Rectangle → 2(l + b)

Therefore, substituting the values in it, we get

⟹ 2( l + b ) h

⟹ 250 × 5

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⟹ 1250 m²

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From the given cost of painting of 1 square metre was ₹8 then cost of painting of the four walls is

= Total area × Cost

⟹ 1250 × 8

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= ₹ 10,000

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As per the Question the cost of painting of the four walls is ₹ 10,000.

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₹ 10,000