Question

Find the surface area of the cylinder to the nereast tenth of a square unit. Use 3.14 for PI.

Answer 1

Given:

Height of the cylinder is, h = 18.2 cm.

Radius of the cylinder is, r = 3 cm.

The objective is to find the surface area of the cylinder.

The formula to find the surface area of the cylinder is,

`SA=2\pi r^2+2\pi rh`

Now substitute the given values in the above equation.

`\begin{gathered} SA=(2\cdot3.14\cdot3^2)+(2\cdot3.14\cdot3\cdot18.2) \\ =(2\cdot3.14\cdot9)+(2\cdot3.14\cdot3\cdot18.2) \\ =56.5+342.9 \\ =399.4cm^2 \end{gathered}`

Hence, option (B) is the correct answer.