Question

A closed circular cylinder has diameter 20 cm and height 30 cm. Find the total surface area of the cylinder (pi = 3.14)

Answer 1

diameter, d = 20 cm
radius of the base of cylinder, r = 10 cm
height , h = 30 cm
$TSAofclosedcylinder=2\mathrm{\pi r}(\mathrm{h}+\mathrm{r})=2\times 3.14\times 10[30+10]=2512{\mathrm{cm}}^3$