Question

The height of the cylinder is 2times the radius of base of cylinder.If the area of base of the cylinder is 154 cm².Find the curved surface area of the cylinder?

• A. 221
• B. 756
• C. 616
• D. 144

Answer 1

Answer:

C. 616

height of the cylinder is 2times the radius of base of cylinder.

$h=2r$

Curved Surface area of Cylinder $=2\pi{r}h$

$=2\pi\times{r}\times{2r}$

$=4\pi{r^2}$ -------------(1)

Given,

area of base of cylinder $=\pi{r^2}=154cm^2$

Sub the $\pi{r^2}$ value in (1)

=>CSA=4\times{154}=616cm^2