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The answer that would best tell the combination of shapes that could make a piano are: 3 cylinders and a rectangular prism
How to find the shape of a piano
The shape of a piano can be gotten from the way that the piano is built. A piano is known to have a shape that is like a chord, it also has the parts that is built like a rectangular prism.
In order to get the volume of the object, the different shapes that it has would be calculated individually using their formula.
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