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The question is followed by two statements I and II.

Mark

1. if the question can be answered by any one of the statements alone, but cannot be answered by using the other statement alone.
2. if the question can be answered by using either statement alone.
3. if the question can be answered by using both the statements together, but cannot be answered by using either statement alone.
4. if the question cannot be answered even by using both the statements together.

A small storage tank is spherical in shape. What is the storage volume of the tank?

1. The wall thickness of the tank is $1$ cm.
2. When an empty spherical tank is immersed in a large tank filled with water, $20$ l of water overflow from the large tank.

option C is correct .

Storage volume of small tank can be measured by the volume of water overflowed excluding (subtracting) the thickness of wall of empty tank.
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