Question

The new cylinder can has radius of 5cm and a height of 9cm how many square centimeters of aluminum will it take to make this new cylinder can ?

Answer 1

Answer:
`282.85\ cm^2`

Explanation:

Given

Radius of cylinder
`r=5\ cm`

The height of the cylinder is
`h=9\ cm`

The surface area of a cylinder is
`2\pi rh`

If only the outer is considered then, the area required is

`\Rightarrow A=2* (22)/(7)* 5* 9\\\\\Rightarrow A=282.85\ cm^2`