Question 15

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waecmaths question: 

The curve surface area of cylindrical tin is 704cm2. If the Radius of its base is 8cm. Find the height? [Take $\pi =\tfrac{22}{7}$]

Option A: 

14cm

Option B: 

9cm

Option C: 

8cm

Option D: 

7cm

waecmaths solution: 

$\begin{align}  & \text{Curved surface area of cylinder is by }2\pi rh \\ & A=2\times \frac{22}{7}\times 8cm\times h=704c{{m}^{2}} \\ & h=\frac{704\times 7}{2\times 22\times 8}=14cm \\\end{align}$

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