geometry

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A right cylinder has the radius of 5 centimeters and height of 22 centimeters.
Round to the nearest tenth.
I need to find -

Find Lateral Area
and
Find Surface area

  • geometry -

    recall that lateral area (area on the sides, not the top or the bottom) of a cylinder is given by,
    LA = 2πrh
    where
    r = radius
    h = height
    π = "pi" equal to 3.14 (constant)
    substituting,
    LA = 2*(3.14)*5*22
    LA = 690.8 cm^2

    recall that the surface area of cylinder is the sum of the lateral area and area of the base, given by
    SA = 2πrh + 2πr^2
    where
    r = radius
    h = height
    π = "pi" equal to 3.14 (constant)
    substituting,
    SA = 2*(3.14)*5*22 + 2*(3.14)*5^2
    SA = 847.8 cm^2

    hope this helps~ :)

  • geometry -

    Thank you so much!

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