Question

the floor of rectangular hall has perimeter 250 m it's hieght is 5m find the cost of painting it's four walls (including doors , window , etc ) at the rate of ₹8 per sq m ​

Answer 1

Answer:

The answer is 1250m²

Step-by-step explanation:

Perimeter= 250m

:. 2(l+b) =250m

l+b= 250/2

l+b= 125m

Height= 5m

C.S.A. of Room(4 walls)

= 2(hl + hb)

= 2h (l+b)

= 2x5 (125)

= 10(125)

=1250m²

Answer 2

$\Large{\underline{\underline{\bf{Answer:-}}}}$

$\red{\bigstar}$ Total Cost [C]

$\huge\leadsto{\sf\purple{10,000 \: Rs}}$

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

$\implies$2( l + b ) h

$\implies$250 × 5

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$\implies$ 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

$\implies$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.

₹ 10,000.⠀⠀⠀⠀⠀⠀⠀⠀

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