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902

Q:

An iron pipe 20 cm long has exterior diameter 25 cm. If the thickness of the pipe is 1 cm, then the whole surface area of the pipe?

  • 1
    $$ {3168\ cm^{2}}$$
  • 2
    $$ {3186\ cm^{2}}$$
  • 3
    $$ {3200\ cm^{2}}$$
  • 4
    $$ {3150\ cm^{2}}$$
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Answer : 1. "$$ {3168\ cm^{2}}$$"

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