Question 83

Height 'h' of a cylinder equals the circumference of its base. Then, the curved surface area in terms of 'h' is:

Solution

According to question,

$$h=2\pi r.$$

or,$$r=\frac{h}{2\pi\ }.$$

So, curved surface area=$$2\pi r\times h=2\pi\ \times\frac{h}{2\pi\ }\times h=h^2.$$

A is correct choice.

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