It's radius is 12mm, and it's height is 29mm.
2007-01-18 03:59:20 · 6 answers · asked by ♫ Saaskie ♫ 1 in Science & Mathematics ➔ Mathematics
surface area of a cylinder =
s = 2 π r² + 2 π h
s = 2(3.141592654)(12)² + 2(3.141592654)(29)
s =6.283185307(144) + 6.283185307(29)
s = 904.7786841 + 182.2123739
s = 1086.991058 square millimeters
The answer is 1087 square millimeters rounded up
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2007-01-18 06:38:04 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
R = 12
Therefore It's diameter = 2 x 12 = 24 mm
C = pi x d
C = 24 x pi
C = 24pi
I'll leave it as the symbol pi just to make the coherence easier.
If you unrolled the cylinder it would resaemble a flat rectangle, plus 2 circles so the C will equal the length, and the height will be the height.
So A = l x h + 2(pi r^2)
A = 24pi x 29 + 288pi
A = 984pi
If you are looking for an accurate answer then...
A = 3091.327171 mm^2
Hope this helps
2007-01-18 04:05:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The surface area is going to be the area of the side, plus the top and bottom. The top and bottom are just circles, so their area is each Pi*(r^2), or 144*pi. The surface that curves around is the circumference of one of the cirlces, times the height. So this is (2*pi*r)*h = 2*pi*12*29 = 696pi.
Add them together and you get 144pi + 144pi + 696pi = 984pi square millimeters.
2007-01-18 04:09:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The formula is SA = 2 pi r squared plus 2 pi r times h
2007-01-18 04:01:52 · answer #4 · answered by hayharbr 7 · 1⤊ 0⤋
SA= 2(12^2* pi) + (24PI*29)
2007-01-18 04:03:52 · answer #5 · answered by shishcabob30 1 · 0⤊ 0⤋
3.1416 x diameter x height
3.1416 x24 x29 = 2186.55 sq mm
2007-01-18 04:09:01 · answer #6 · answered by Safe D 1 · 0⤊ 0⤋