Question
A rectangular container, whose base is a square of side $5\ cm,$ stands on a horizontal table, and holds water up to $1\ cm$ from the top. When a solid cube is placed in the water it is completely submerged, the water rises to the top and $2$ cubic $cm$ of water overflows. Calculate the volume of the cube and also the length of its edge.

Answer

Let the length of each edge of the cube be $'x\ ’ \ cm$
Then, volume of the cube $=$ Volume of water inside the tank $+$ Volume of water that overflowed
$x^3 = (5 \times 5 \times 1) + 2$
$x^3 = 27$
$x = 3\ cm$
Hence, volume of the cube $= 27\ cm^3$
And edge of the cube $= 3\ cm$

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