Question 33

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Jambmaths question: 

A cylindrical pipe 50m long with radius 7 m has one end open. What is the total surface area of the pipe?

Jamb Maths Solution: 

$\begin{align}  & A=\pi {{r}^{2}}+2\pi rh \\ & A=\pi r(r+2h) \\ & A=7\pi (7+2\times 50)=7\pi (107)=749\pi {{m}^{2}} \\ & A=749\pi {{m}^{2}} \\\end{align}$

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