Question

Use a net to find the surface area of the open cylinder with only one base. Use 3.14 for pi.

Answer 1

251.20 cm square

Explanation:

As given in figure

height of cylinder = 2 cm

radius of cylinder = 8 cm

lateral surface area of cylinder is given by =
`\pi r l`

where r is the radius and l is the height

Therefore, lateral surface area of given cylinder

`\pi r l = 3.14*8*2 = 50.24`

area of base is give by
`\pi r^2`

since there is only one base area of that base

=
`\pi r^2 = 3.14*8^2 = 3.14*64 = 200.96`

Thus,

Total surface area of open cylinder = 50.24 + 200.96 = 251.20 cm square