Posted by JOY on Tuesday, May 24, 2011 at 10:26am.
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  Jai, Tuesday, May 24, 2011 at 10:35am
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  JOY, Tuesday, May 24, 2011 at 10:58am
Thank you so much!
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