A cylinder of radius 12 cm containing water reduces its water level by 1 cm when a fully immersed hemi spherical ball is removed from this cylindrical container then find the radius of removed spherical ball.
The radius of spherical ball is r cm. From the question, Volume of the hemi sphere = Volume of the 1 cm reduced cylindrical part 
A Tank has two pipes one can fill it with water in 16 hours and other can empty it in 10 hours. In how many hours will the Tank be emptied if both the p...
Pipe P can fill half of the tank in 8 hrs 5 min and pipe Q can fill the same tank completely in 16 hrs 5 min. Another pipe R can empty the full tank in ...
Pipe ‘A’ can fill a tank in 60 hours whereas leak ‘A’ can empty it in 70 hours. If they both operate along with pipe ‘B’, then the given tan...
Pipe ‘A’ can fill a tank in 40 hours whereas leak ‘A’ can empty it in 50 hours. If they both operate along with pipe ‘B’, then the given tan...
Two pipes A and B can fill a tank in 4 hours and 7 hours respectively & a waste pipe C can empty in 8 hours. If pipes A , B & C are opened at 7a...
Pipe ‘A’ can fill a tank in 20 hours while pipe ‘B’ takes 25 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 1...
Two pipes 'P' and 'Q' together can fill a tank in 16 minutes while 'Q' alone can fill the tank in 24 minutes. How much time does pipe 'P' alone need to ...
Pipe ‘A’ can fill a tank in 10 hours while pipe ‘B’ can empty it in 12 hours. They were operated on alternate hours starting with pipe ‘A’. ...
Pipe A can fill a tank in 50% less time than it takes pipe B to empty it, while pipe C can fill the same tank in 25% less time than pipe B's emptying du...
In what time would a Cistern be filled by three pipes whose diameter are 2cm, 2 2/3cm and 4cm running together, where the largest pipe alone fill it in ...
