一個圓柱體

表面面積是:6^2*3.14*2+2*3.14*6=263.76(平方厘米)

602.88(cm2)

(36*3.14/2)*(10+1)
=(56.52)*11
=621.72

2007-04-25 21:16:44 補充：
621.72 +56.52=678.24

S側= 2 π ｒ．ｈ　＝120　π

S上底+S下底= ２π ｒ^2　＝７２　π　

S表= S側+S上底+S下底=192 π (ｃｍ＾２)

應該無計錯過...xd〞

r = 6cm,
h = 10cm,
surface area = (2 x r x 3.14 x h)cm
= (2 x 6cm x 3.14 x 10cm)cm
= 376.8cm"2"

6嘅２次 X 3.14 X 2（２個圓面）+ 2 X 6 X 3.14 X 10 (曲面)

=226.08 + 376.8

=602.88平方厘米

I hope I can help you

6 X 3.1415926535897932384626433832795 X 10 + 6 X 6 X 3.1415926535897932384626433832795 X 2 = 301.59289474462015089241376479483

2007-04-25 19:56:41 補充：
6 X 2 X 3.1415926535897932384626433832795 X 10 + 6 X 6 X 3.1415926535897932384626433832795 X 2 = 603.18578948924030178482752958966

6 x 2 x 3.14 + 10 x 3.14
=37.68 + 31.4
=69.08

∴表面面積是69.08 cm

6x2x3.14x10
=376.8(cm)

答案=57.68