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A rectangular tank is completely filled ...

A rectangular tank is completely filled with water. But due to leakage, water continuously flows out of it and finally, the tank is empty. Discuss the variation in the position of the centre of gravity as the water leaks out.

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Initially when the tank is completely filled with water, the CG is at the geometric centre of the trank. But as the water leaks out, the CG shifts downward. When water leaks out completely such that the tank is now empty, the CG agin reaches the geometric centre.
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