Homework Help: MATHS

Posted by TUHITUHI on Saturday, November 24, 2012 at 12:21pm.

A cylindrical water tank of diameter 1.4m and height 2.1m is being feed by a pipe of diameter 3.5cm through which water follows at the rate of 2m/per second . In how much time the tank will be filled ???

MATHS - Reiny, Saturday, November 24, 2012 at 12:36pm
volume of tank
= π(.7^2)(2.1) = 1.029π m^3

radius of pipe = .0175 m
volume of water per second going through pipe
= π(.0175^2)(2) = .006125 m^3 /sec

time = 1.029π/.006125π sec = 1680 sec
= 28 minutes

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