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.)
英语人气:385 ℃时间:2019-09-27 12:54:36
优质解答
水从一个倒圆锥状的箱里以11000 cm3/分钟的速度流出来.同一时间,水以一个不变的速度被泵入箱里.这个箱子高6m,顶部的直径长4m.如果水位上升的速度为20cm/分钟时水深2m.求水被泵入箱子的速度.(把答案约到最近的整数)我能看懂 就是不会算!半径:高度 = 2m:6mr(2m高的半径):2m →r = (2/3)m2m时面积 = 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答案正确不,好久没做这些题了。。。不对啊我还有两次机会v = 290253cm^3/min对不起,忘记小数点往上约了。这个应该是答案了。顺便一提,如果π是按3.14算,那么答案是290111cm^3/min。
我来回答
类似推荐
猜你喜欢
- 1已知: 2H2(g)+O2(g)═2H2O(l)△H=-571.6kJ•mol-1; CH4(g)+2O2(g)═CO2(g)+2H2O(l)△H=-890kJ•mol-1. 现有H2与CH4的混合气体112L(标准状况),使其完全燃烧生成
- 2急..八年级上册英语课本短文
- 3王老师把六一班一次数学测验的成绩绘制成了统计表和统计图,由于不小心把统计表和统计图弄脏了,有些数据已经完全看不清楚.请你根据能看清楚的信息帮王老师计算出完全看不清楚的信息.
- 4H2O和Na2O2反应,为什么转移2e-个电子
- 5某导体的电阻R=5000欧,电流通过该导体在10分钟做了3*10^4焦的功,求:导体两端电压和导体的电功率
- 6有理数乘法法则:两数相乘,同号得 _正___ ,异号得__ 负_ ,___ 并把__绝对值相乘_____
- 7根号下:ax²+4ax+3 ,此函数的定义域为R,则实数a的范围是……
- 8一杯盐水,盐与盐水的比为1:5,再加上16克盐后,盐与盐水的比为1:4,原来盐水有多少千克?
- 9Let's read from the ( )(开始) of this story book
- 10直角三角形ABC中AB=8cmBC=10cm在里面作一个正方形BEFD求这个正方形的面积