A cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of the vessel are  20cm×15cm  .The rise of water level is ____.

# A cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of the vessel are   .The rise of water level is ____.

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### Solution:

Volume of a cube is   ,
Volume of a cuboid is    ,

We are given that a cube of edge 15 cm is immersed completely in a rectangular vessel containing water. If the dimensions of the base of the vessel are  .
To find: rise in water level
The volume of rectangular vessel before immersing is  .

The volume of rectangular vessel after immersing is  .

Volume of the cube is  .

Statement 1: The increase in volume of water is the volume of the rectangular container after immersion minus the volume of the rectangular container before immersion.
Statement 2: The increase in volume of water is equal to the volume of the submerged cube.
From the above statements, we assume that
The volume of the submerged cube is equal to the volume of the rectangular container after immersion minus the volume of the rectangular container before immersion.

The rise in water level 11.25 cm.

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