close
標題:
簡單球體面積及體積問題!
發問:
有答案,求步驟! 問題在圖片內: http://img15.imageshack.us/i/img066ki.jpg/
下列各題r为半徑 6. 4πr^2=6(10)(10) r=6.91cm7.4π(6)^2+4π(8)^2=4πr^2 4π(6^2+8^2)=4πr^2 r=10cm8a.表面面積之比=4π6380^2 : 4π1750^2 =13.3:1 8b.體積之比=(4/3)π6380^3:(4/3)π1750^3 =48.5:19.(4/3)π1^3 × 8 = (4/3)πr^3 r=2 cm 直徑=2×2 =4 cm10.體積=(4/3)π9^3-(4/3)π8^3 =909cm^311.設原來水位是h cm (4/3)πr^3 + π(64/2)^2 × h =π32^2(h+2/3) (4/3)πr^3 = π32^2(h+2/3)-π32^2 × h (4/3)πr^3 = π32^2(h+2/3-h) r = 8 cm 11a. 體積=π4^2 × 9 + (4/3)π4^3 ÷2 =144π+128/3π =560π/3 cm^311b.總表面面積=π4^2+2π4 × 9 +4π4^2 ÷2 =120π cm^2 2011-04-19 19:38:10 補充: 12a. 體積=π4^2 × 9 + (4/3)π4^3 ÷2 =144π+128/3π =560π/3 cm^3 12b.總表面面積=π4^2+2π4 × 9 +4π4^2 ÷2 =120π cm^2
其他解答:FAD2A23AB937987B
簡單球體面積及體積問題!
發問:
有答案,求步驟! 問題在圖片內: http://img15.imageshack.us/i/img066ki.jpg/
- 手提電腦點簡好-@1@
- 咖啡師課程 ((20分))
- 想問紅磡點去馬騮山-!!
- 手機!!"邊部新機有牙@1@
- 希獵的宗教問題
- 德國百靈牌Epil Xelle脫毛器..........@1@
- 中三生用咩牌子的袋好(300以內)@1@
- 我要Vanessa Anne Hudgens(High School Musical)既圖片~
- 我要肥!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!@1@
- 我想寄信畀吳尊,地址寫咩呀?@1@
此文章來自奇摩知識+如有不便請留言告知
最佳解答:下列各題r为半徑 6. 4πr^2=6(10)(10) r=6.91cm7.4π(6)^2+4π(8)^2=4πr^2 4π(6^2+8^2)=4πr^2 r=10cm8a.表面面積之比=4π6380^2 : 4π1750^2 =13.3:1 8b.體積之比=(4/3)π6380^3:(4/3)π1750^3 =48.5:19.(4/3)π1^3 × 8 = (4/3)πr^3 r=2 cm 直徑=2×2 =4 cm10.體積=(4/3)π9^3-(4/3)π8^3 =909cm^311.設原來水位是h cm (4/3)πr^3 + π(64/2)^2 × h =π32^2(h+2/3) (4/3)πr^3 = π32^2(h+2/3)-π32^2 × h (4/3)πr^3 = π32^2(h+2/3-h) r = 8 cm 11a. 體積=π4^2 × 9 + (4/3)π4^3 ÷2 =144π+128/3π =560π/3 cm^311b.總表面面積=π4^2+2π4 × 9 +4π4^2 ÷2 =120π cm^2 2011-04-19 19:38:10 補充: 12a. 體積=π4^2 × 9 + (4/3)π4^3 ÷2 =144π+128/3π =560π/3 cm^3 12b.總表面面積=π4^2+2π4 × 9 +4π4^2 ÷2 =120π cm^2
其他解答:FAD2A23AB937987B
文章標籤
全站熱搜
留言列表