小学英语句型转换(50道难题)及答案和小学数学圆柱圆锥习题(越难越多越好)及答案 圆柱形的英文题

www.zhiqu.org     时间: 2024-06-12

求下面圆柱体的侧面积、表面积、体积。(单位:厘米)

例2.有一个圆柱体的零件,底面半径6厘米,高20厘米,零件的一端有一个圆柱形的直洞,如图所示,洞口半径4厘米,洞深10厘米。如果把这个零件的表面部分涂上防锈漆,一共需涂多少平方厘米?

例3.(如图)一个半径为4厘米,高为4厘米的圆柱体,在它的中间依次向下挖半径分别是3厘米,2厘米,1厘米,高分别为2厘米,1厘米0. 5厘米的圆柱体,则最后得到的立体图形表面积是多少平方厘米?

例4.一根圆木底周长3.14米,高4米,沿底面直径锯开,成为两个相等的半圆柱体。求锯开后半圆柱体的表面积。

例5.有一棱长为40厘米的正方体零件,它的上、下两个面的正中间各有一个直径为4厘米的圆孔,孔深为10厘米。试求这个零件的表面积和体积。

例6.如图所示,比较甲、乙两个容器中,哪一个容器中盛的水多?哪个容器用料少?(两个容器都没有盖)(单位:厘米)

【课内练习】

一、填空:

1.用一张边长5分米的正方形纸围成一个圆柱,这个圆柱的侧面积是(     )平方分米。

2.一个圆锥体,它的底面半径是2厘米,高3厘米,它的体积是(     )立方厘米。

3.一个圆锥体的底面积是18.84平方厘米,高是10厘米,它的体积是(     )立方厘米。

4.一个圆柱体的底面半径是2分米,高是4分米,圆柱体的侧面积是(      )。

5.一个圆柱体的底面周长是12.56米,高1米,圆柱体的表面积是(      )。

6.一个圆锥和一个圆柱体的底面积、体积都相等,如果圆锥的高是15厘米,圆柱的高是(     )厘米。

7.一个圆锥体的体积是9立方厘米,和它等底等高的圆柱的体积是(    )。

二、解答题:

1.如图,求圆柱的表面积和体积(单位:厘米)。

2.做10个圆柱形通风管,长1.2米,管口周长40厘

米。至少需要多少平方分米的铁皮?

3.求下面空心圆柱的体积(单位:厘米)。

4.如果把上题中的空心圆柱体表面涂油漆,涂油漆的面积是多少?

5.求下面零件的体积,如果每平方厘米体积重5克,这个零件重多少克?(单位:厘米)



小学关于圆柱圆锥的奥数难题,要越难越好,带上答案~

超难的圆柱问题要答案

to get the area of the top, we need to get the circumstance of the circle, so, we do:

10/8 which gives us 1.25 which is the circumstance of the circle at the top of the cylinder(circumstance of top).
This allows us to calculate the area of the top, we do:
1.25/pie then divide by 2 which equals 0.198943....that is the radius of the area top。
Now, use the radius to find the area of the circle:
0.198943.... square x pie=0.12433....
which then round up to 2 d.p is 0.12

(本人认为这道题在文字表达出得有些问题,所以如果任何回答有错误,请多包涵。如果提问者需要中文解释的话,可以到BaiduHi上来找我或者,在下面的帖子上回答。谢谢)


#衡蒋静# 英语六年级词性转换题和句型转换 -
(15154578686): 一.句型转换.1.It cost me ten yuan .(用spend和take改此句型)(注意本句的句型)2.I put on the wall newspaper on my classroom's wall yesterday.(改为现在进行时态)3.Which sport do you like best, basketball,football or tennis?(篮球)4....

#衡蒋静# 小学生六年级英语句型转换及答案 -
(15154578686): 1.Tom does his homework in the evening.(改为否定句) Tom ______ ______ his homework in the evening. 2.He's already finished his homework.(改为一般疑问句) ______ he finished his homework ______? 3.Kate has little bread for ...

#衡蒋静# 小学英语的几个句型转换(用来核对答案)Model:Li Lei has finished his homework already.(改成疑问句)```````Has Li Lei finished his homework yet?1.I have ... - 作业帮
(15154578686):[答案] I haven't made the same mistake 12 times. Where has Li Xiao gone? She has never eaten any mangoes. Have my grandma and grandpa planted hundreds of roses in the garden? I haven't seen Kate since 1995.

#衡蒋静# 小学英语 第三大题 句型转换 -
(15154578686): 1,how to get to the park2,go along this road 3,next to the park4,how I can get to

#衡蒋静# 求小学生英语句型转换的题目. -
(15154578686): 1. Ben enjoyed himself at the party. (保持原句意思) Ben____ ____ ____ ____ at the party. 2. I have never been to Australia. (一般疑问句) _______ you _______ been to Australia? 3. Jane often gets letters from her brother Joe. (保持原句意...

#衡蒋静# 求英语句型转换!小学水平!急! -
(15154578686): 1 tony cant speak English,2 can you ride bike,yes,i can,3 who can drive the car,4 what can you see in the room,5 these are green cars,6 is mr.green a teacher,7 his parents are teachers,8 what is your father's job,9 Betty cant play table tennis,10 ...

#衡蒋静# 小学英语六年级句型转换 -
(15154578686): 1`Wang Lei usually goes to school (by bike).对括号里的部分提问How__ does__Wang Lei usually_go_to school?2、My sister walks to school.改为同义句My sister goes to school on__ _foot_.3·(N)My school is (near the hospital.)对括号里的部分提...

#衡蒋静# 小学六年级英语根据句型转换
(15154578686): 1. what's the clock 2. were u blowing XXXXXX 3. she doesnt read XXXXX 4. do u like XXXX 5. plz dont 6. we are in XXXX

#衡蒋静# 求小学生英语句型转换的题目. -
(15154578686): 一、肯定句改否定句的方法—— 一步法1、在be动词后加not.如:is not , are not , am not, was not, were not;2、在can,should, will等后加not.如:cannot, should not, will not;3、上述都没有的,在动词前加助动词否定形式don't/doesn't/didn't...

#衡蒋静# 小学英语句型转换练习题梨朴耙?海的怀抱,那才是你的确实,我爱洞庭湖兰,那是一片没有道路的荒原? - 作业帮
(15154578686):[答案] 一、把be动词(am is are)和情态动词(can,may,must...)放到句首,其它照写.遇I/we—you,my—your.some—any.句号变成... ________________________________________ 4.They are in the zoo.______________________ 小学英语句型转换练...