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

- MATHS -
**kavya **, Wednesday, April 8, 2015 at 10:56am
how did the radius become 0.0175? 3.5 is the diameter so 3.5/2=1.75

pls correct.iam confused with this qyestion

- MATHS -
**kavya **, Wednesday, April 8, 2015 at 10:58am
how did the radius become 0.0175? 3.5 is the diameter so 3.5/2=1.75

pls correct.iam confused with this qyestion

sry sry its 3.5 cm its my mistake

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