Question 29

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waecmaths question: 

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

Option A: 

77cm2

Option B: 

227cm2

Option C: 

297cm2

Option D: 

374cm2

waecmaths solution: 

$\begin{align}  & A=2\pi r(r+h) \\ & A=2\times \frac{22}{7}\times \frac{7}{2}\left( \frac{7}{2}+10 \right)c{{m}^{2}}=22\left( \frac{27}{2} \right)c{{m}^{2}}=297c{{m}^{2}} \\\end{align}$

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