thank you very much
thank you very much
Water is leaking out of an inverted conical tank at a rate of 11,000 cm3/min
at the same time that water is being pumped into the tank at a constant
rate.The tank has height 6 m and the diameter at the top is 4 m.If
the water level is rising at a rate of 20 cm/min when the height of the
water is 2 m, find the rate at which water is being pumped into the
tank. (Round your answer to the nearest integer.)
Water is leaking out of an inverted conical tank at a rate of 11,000 cm3/min
at the same time that water is being pumped into the tank at a constant
rate.The tank has height 6 m and the diameter at the top is 4 m.If
the water level is rising at a rate of 20 cm/min when the height of the
water is 2 m, find the rate at which water is being pumped into the
tank. (Round your answer to the nearest integer.)
英語人氣：127 ℃時(shí)間：2019-09-27 12:54:36
優(yōu)質(zhì)解答
水從一個(gè)倒圓錐狀的箱里以11000 cm3/分鐘的速度流出來.同一時(shí)間,水以一個(gè)不變的速度被泵入箱里.這個(gè)箱子高6m,頂部的直徑長4m.如果水位上升的速度為20cm/分鐘時(shí)水深2m.求水被泵入箱子的速度.（把答案約到最近的整數(shù)）我能看懂 就是不會算!半徑：高度 = 2m:6mr(2m高的半徑)：2m →r = (2/3)m2m時(shí)面積 = πr^2 = π(2/3m)^2 = (4/9)πm^2 = (40000/9)πcm^2速度：20cm/min*(40000/9)πcm^2 = (800000/9)πcm^3/min = 279252.68cm^3/min279252.68cm^3/min = v - 11000cm^3/minv = 290252cm^3/min答案正確不，好久沒做這些題了。。。不對啊我還有兩次機(jī)會v = 290253cm^3/min對不起，忘記小數(shù)點(diǎn)往上約了。這個(gè)應(yīng)該是答案了。順便一提，如果π是按3.14算，那么答案是290111cm^3/min。
我來回答
類似推薦
- It's cold outside.please ______ the door.
- 設(shè)函數(shù)f（x）=kx3+3（k-1）x2-k2+1在區(qū)間（0，4）上是減函數(shù)，則k的取值范圍是_．
- 戊戌變法是 師夷長技以制夷 還是 師夷長技以自強(qiáng) 這兩個(gè)分別是誰提出的 急
- Our white T-shirts are only 12 dollars.【改為同義句】
- 已知x+2y=0(x≠0),求分式x²-xy分之2xy+y²的值
- 在北師大版八年級下冊P29知識技能第1題第六個(gè).
- 某班有女生24人,比男生人數(shù)的5分之4多4人,男生有多少人?
- -1,2,-4,8,-16,32.第2011個(gè)數(shù)是什么
- 江西詩派 名詞解釋
- Tina won't go out to play until she< >her homework
- 《已亥雜詩 其五》有什么寫作特點(diǎn)?
- need/want/require/ 這三個(gè)詞表需要時(shí)有什么不同
猜你喜歡
- 1She was seen a story book yesterday.這句話改成主動(dòng)語態(tài)怎么改?
- 2把多項(xiàng)式12xy的2次方 - 5x的2次方y(tǒng)的2次方 - 6x的3次方y(tǒng)的3次方 - 8,按x升冪排列的結(jié)果是（ ）.
- 3他在書桌上輕輕地刻了一個(gè)小小的字:“早”
- 4down the narrow street中的down是什么意思?
- 5《新聞兩則》試題
- 6已知在五邊形ABCDE中,角A=180度,角B=90度,若角C=角D=角E,則角E的度數(shù)為多少?
- 7初二的一道選擇題,幫忙.
- 8ATA單證冊的全稱
- 9It's raining heavily.They come to school ___(later)
- 10表示許多的英語單詞如何區(qū)分?（初中英語）
- 11小明和同學(xué)擺成一個(gè)方陣,他在左邊數(shù)第1個(gè),右邊數(shù)第4個(gè),前面數(shù)第2個(gè),后面數(shù)第3個(gè),方陣多少人
- 12以給我影響最大的.為題寫一篇400到500字的作文