The formula for the surface area of a cylinder is:
2(pi)(r)(h) + 2(pi)(r^2)
Where:
pi = 3.14
r = radius = 4 metres
h = length = 20 metres
Substituting the values, we get:
2(3.14)(4)(20) + 2(3.14)(4^2)
251.2 + 100.48
351.68
Therefore, Lionel needs to paint a surface area of approximately 351.68 square metres.
Use 3.14 as pi. Lionel wants to paint a cylindrical hollow plastic pipe with a radius of 4 metres and a length of 20 metres. a. Determine the surface area to be painted.
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