math question

2007-10-18 3:11 pm
1. water is pouring into a cylinder tank of height 10 m and radius 3m at a rate of 5m^3/min
(a) at waht rate does the surface of the water rise?
(b) how long does it take to fill the tank?

回答 (1)

2007-10-18 5:34 pm
✔ 最佳答案
(a) h is the height of the water surface from the bottom of the tank
Volume of water/min = pi (3^2)*h
5 = 9 pi h
h = 5/(9*pi)
=0.1768... m/min
(b) 10/0.1768 = 56.548... min


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