Question

One link in a chain was made from a cylinder that has a radius of 2 cm and a height of 20 cm. How much plastic coating would be needed to coat the surface of the chain link? Use 3.14 for π.

a chain link made from a cylinder that has been bent so that its ends are connected, creating a continuous loop

251.2cm2
314 cm2
345.4 cm2
471 cm2

Answer 1

Answer: 251.2cm^2

Step-by-step explanation:

Given radius of the cylinder 'r' = 2 cm

Given Height of the cylinder 'h' = 20 cm

Area of the curved surface =  2 π r h

The plastic coating would be needed to coat the surface of the chain link

                A =  2 π r h

               A =  2 × 3.14 ×2×20

              A   = 251.2 cm²

Conclusion:-

The  plastic coating would be needed to coat the surface of the chain link       = 251.2 cm²

Answer 2

The surface area coating that is required for one link in a chain is needed.

The plastic coating required to cover one chain link in a chain is 251.2 cm². The calculations have been shown below.

Area of a cylinder

r = Radius of the cylinder = 2 cm

h = Height of the cylinder = 20 cm

When the link will be bent the top and bottom of the cylinder will be joined together. So, we do not need to find the area of the top and bottom faces.

Area is given by

$A=2\pi rh\\\Rightarrow A=2\times 3.14\times 2\times 20\\\Rightarrow A=251.2\ \text{cm}^2$

Learn more about area of cylinder:

https://brainly.com/question/14657844