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 :
a) $$\frac{{\text{h}}}{2}$$ units
b) 1h units
c) 2h units
d) 4h units
Answer: c
Explanation: Radius of the base = r units
Curved surface area of a right cylinder = $$4\pi {\text{r}}h$$
Curved surface area of cylinder = $$2\pi {\text{RH}}$$
$$2\pi {\text{rH = }}4\pi {\text{rh}}$$
⇒ Height of cylinder = 2h units
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