Question

Please answer this up folks
It's really urgent
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The external diameter of a cylindrical shaped iron pipe is 25 cm and it's height is 20cm. If the thickness of the pipe is 1cm, find the total surface area of pipe
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Answer 1

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The external diameter of a cylindrical shaped iron pipe is 25 cm and its length is 20 cm. If the thickness of the pipe is 1cm, find the total surface area of the pipe.

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Given:

• External diameter of pipe(d)= 25 cm.
• Thickness of pipe = 1 cm.
• Height of hollow cylinder (h)= 20 cm.

To find:

• Total surface area of pipe = TSA of hollow cylinder ?

♾♾♾Solution♾♾♾

External radius of pipe= d/2 = 25/2 = 12.5 cm.

External surface area of pipe = CSA = 2πrh

=2π×12.5×20

=500π cm^2

Thikness of pipe = 1 cm.

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∴ Internal radius of pipe

= r = ( r-1) = 12.5 - 1 = 11.5 cm.

Internal surface area of pipe = CSA = 2πrh

=2π×11.5×20

=460 cm^2

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TSA of hollow cylinder

=CSA(internal) + CSA(external)

=500π+460π

=960π cm^2

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∴ The total surface area of the hollow cylinder is 960πcm^2.

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Answer 2

Answer:

Here's ur answer Karan..❤❤

Hope it helps uhh..❤

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