What is the total surface area of a closed cylinder of height 10cm and diameter 7cm? [Take \(\pi = \frac{22}{7}\)]

  • A 77cm2
  • B 227cm2
  • C 297cm2
  • D 374cm2
waec 2005mathematics

The correct answer is C. 297cm2

T.S.A of s closed cylinder = \(2\pi r(r+h)\\

=\frac{2}{1}\times \frac{22}{7} \times \frac{7}{2}\left(\frac{7}{2}+\frac{10}{1}\right)=\frac{22}{1}\left(\frac{27}{2}\right)=27\time 11=297cm^2\)

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