The radius of base and curved surface area of a right cylinder is 'r' units and 4πrh square units respectively. The height of the cylinder is :
Options:
A . $$\frac{{\text{h}}}{2}$$ units
B . 1h units
C . 2h units
D . 4h units
Answer: Option C Radius of the base = r units Curved surface area of a right cylinder = $$4\pi {\text{r}}h$$ Curved surface area of cylinder = $$2\pi {\text{RH}}$$ ∴ According to the question, $$2\pi {\text{rH = }}4\pi {\text{rh}}$$ ⇒ Height of cylinder = 2h units
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