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**Facundo** A king wanted to build a tower to store all the water for him and his whole family and court.

The base of the tower is in the shape of a regular triacontakaihenagon, with each side measuring one metre on the exterior, and the tower rises vertically to a height of 31 metres, and it has a flat roof. The walls and roof are 30 centimetres thick.

How many litres of water are required to fill the entire tower?

Thanks a lot :). Anyone who can solve it will earn my never-ending thanks. Need it for Friday morning :(.