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Interview Question

Software Engineer I Interview(Student Candidate) New Delhi (India)

Puzzle question: A Floating ship contains 1 stone , If I

  drop that stone in sea,,What will happen with water level??? Is it increase or decrease n why??
archme.. principal, boyency force

Interview Answer

8 Answers


after long discussion... concluded that it will decrease..

Interview Candidate on Jun 16, 2012

nothing will happen

vijay on Jun 24, 2012

even i feel nothing will happen to the level.plz explain the ans.

deepa on Nov 7, 2012

Level will decrease

Anonymous on Feb 27, 2014

Yes It will decrease, as per Arcemedes object with same masses upward buoyant force is higher for object which has larger volume area, so when stone is on boat, it increase boat weight and so upward buoyant force is high for boat, but when It is thrown its upward buoyant force is less with compare to when it is on boat, and upward buoyant force of boat also decreases because stone is thrown, so ultimately upward buoyant force decrease than means decrease in water level, hope it will help :)

Ajay on Apr 1, 2014

I think it will decrease as when the stone is on the boat the volume of water it displaces is more than when it is thrown into the sea. as more volume of water is displaced the more water level goes up we can say that water level will be higher when the stone is on the boat.

Rohit on Oct 2, 2014

The amount of water displaced is equal to the mass of the object immersed. Since the net mass of objects in water is the same, the same amount of water needs to be displaced. Hence no change in the water level.

Saurav Kothari on Oct 8, 2014

It solely depends upon the density of stone.
If density of stone is higher than boat material then it will increase the water level ..
Otherwise decrease

Shyam on Jun 21, 2016

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